Map a network drive to be used by a service

Question

Suppose some Windows service uses code that wants mapped network drives and no UNC paths  How can I make the drive mapping available to the service s session when the service is started  Logging in as the service user and creating a persistent mapping will not establish the mapping in the context of the actual service

User · Answer

You could us the  net use  command   var p   System Diagnostics Process Start  net exe    use K      Server  path    var isCompleted   p WaitForExit 5000     If that does not work in a service  try the Winapi and PInvoke WNetAddConnection2  Edit  Obviously I misunderstood you - you can not change the sourcecode of the service  right  In that case I would follow the suggestion by mdb  but with a little twist  Create your own service  lets call it mapping service  that maps the drive and add this mapping service to the dependencies for the first  the actual working  service  That way the working service will not start before the mapping service has started  and mapped the drive

User · Answer

You ll either need to modify the service  or wrap it inside a helper process  apart from session drive access issues  persistent drive mappings are only restored on an interactive logon  which services typically don t perform   The helper process approach can be pretty simple  just create a new service that maps the drive and starts the  real  service  The only things that are not entirely trivial about this are    The helper service will need to pass on all appropriate SCM commands  start stop  etc   to the real service  If the real service accepts custom SCM commands  remember to pass those on as well  I don t expect a service that considers UNC paths exotic to use such commands  though     Things may get a bit tricky credential-wise  If the real service runs under a normal user account  you can run the helper service under that account as well  and all should be OK as long as the account has appropriate access to the network share  If the real service will only work when run as LOCALSYSTEM or somesuch  things get more interesting  as it either won t be able to  see  the network drive at all  or require some credential juggling to get things to work

User · Answer

I found a solution that is similar to the one with psexec but works without additional tools and survives a reboot   Just add a sheduled task  insert  system  in the  run as  field and point the task to a batch file with the simple command  net use z   servername sharedfolder  persistent yes   Then select  run at system startup   or similar  I do not have an English version  and you are done

User · Answer

The reason why you are able to access the drive in when you normally run the executable from command prompt is that when u are executing it as normal exe you are running that application in the User account from which you have logged on   And that user has the privileges to access the network  But   when you install the executable as a service   by default if you see in the task manage it runs under  SYSTEM  account   And you might be knowing that the  SYSTEM  doesn t have rights to access network resources    There can be two solutions to this problem     To map the drive as persistent as already pointed above  There is one more approach that can be followed  If you open the service manager by typing in the  services msc you can go to your service and in the properties of your service there is a logOn tab where you can specify the account as any other account than  System  you can either start service from your own logged on user account or through  Network Service   When you do this    the service can access any network component and drive even if they are not persistent also   To achieve this programmatically you can look into  CreateService  function at  http   msdn microsoft com en-us library ms682450 v vs 85  aspx and can set the parameter  lpServiceStartName   to  NT AUTHORITY NetworkService   This will start your service under  Network Service  account and then you are done   You can also try by making the service as interactive by specifying SERVICE INTERACTIVE PROCESS in the servicetype parameter flag of your CreateService   function but this will be limited only till XP as Vista and 7 donot support this feature    Hope the solutions help you   Let me know if this worked for you

User · Answer

Use this at your own risk   I have tested it on XP and Server 2008 x64 R2   For this hack you will need SysinternalsSuite by Mark Russinovich   Step one  Open an elevated cmd exe prompt  Run as administrator   Step two  Elevate again to root using PSExec exe  Navigate to the folder containing SysinternalsSuite and execute the following command psexec -i -s cmd exe you are now inside of a prompt that is nt authority system and you can prove this by typing whoami  The -i is needed because drive mappings need to interact with the user  Step Three  Create the persistent mapped drive as the SYSTEM account with the following command net use z    servername sharedfolder  persistent yes  It s that easy   WARNING  You can only remove this mapping the same way you created it  from the SYSTEM account  If you need to remove it  follow steps 1 and 2 but change the command on step 3 to net use z   delete   NOTE  The newly created mapped drive will now appear for ALL users of this system but they will see it displayed as  Disconnected Network Drive  Z     Do not let the name fool you  It may claim to be disconnected but it will work for everyone  That s how you can tell this hack is not supported by M

User · Answer

You could us the  net use  command   var p   System Diagnostics Process Start  net exe    use K      Server  path    var isCompleted   p WaitForExit 5000     If that does not work in a service  try the Winapi and PInvoke WNetAddConnection2  Edit  Obviously I misunderstood you - you can not change the sourcecode of the service  right  In that case I would follow the suggestion by mdb  but with a little twist  Create your own service  lets call it mapping service  that maps the drive and add this mapping service to the dependencies for the first  the actual working  service  That way the working service will not start before the mapping service has started  and mapped the drive

User · Answer

There is a good answer here  https   superuser com a 651015 299678  I e  You can use a symbolic link  e g   mklink  D C  myLink   127 0 0 1 c

User · Answer

I can t comment yet  working on reputation  but created an account just to answer  Tech Jerk  spankmaster79  nice name lol  and  NMC issues they reported in reply to the  I found a solution that is similar to the one with psexec but works without additional tools and survives a reboot   post  Larry had made   The solution to this is to just browse to that folder from within the logged in account  ie          servername share     and let it prompt to login  and enter the same credentials you used for the UNC in psexec   After that it starts working  In my case  I think this is because the server with the service isn t a member of the same domain as the server I m mapping to   I m thinking if the UNC and the scheduled task both refer to the IP instead of hostname        123 456 789 012 share    it may avoid the problem altogether    If I ever get enough rep points on here i ll add this as a reply instead

User · Answer

You wan t to either change the user that the Service runs under from  System  or find a sneaky way to run your mapping as System    The funny thing is that this is possible by using the  at  command  simply schedule your drive mapping one minute into the future and it will be run under the System account making the drive visible to your service

User · Answer

You wan t to either change the user that the Service runs under from  System  or find a sneaky way to run your mapping as System    The funny thing is that this is possible by using the  at  command  simply schedule your drive mapping one minute into the future and it will be run under the System account making the drive visible to your service

User · Answer

A better way would be to use a symbolic link using mklink exe  You can just create a link in the file system that any app can use  See http   en wikipedia org wiki NTFS symbolic link

User · Answer

The reason why you are able to access the drive in when you normally run the executable from command prompt is that when u are executing it as normal exe you are running that application in the User account from which you have logged on   And that user has the privileges to access the network  But   when you install the executable as a service   by default if you see in the task manage it runs under  SYSTEM  account   And you might be knowing that the  SYSTEM  doesn t have rights to access network resources    There can be two solutions to this problem     To map the drive as persistent as already pointed above  There is one more approach that can be followed  If you open the service manager by typing in the  services msc you can go to your service and in the properties of your service there is a logOn tab where you can specify the account as any other account than  System  you can either start service from your own logged on user account or through  Network Service   When you do this    the service can access any network component and drive even if they are not persistent also   To achieve this programmatically you can look into  CreateService  function at  http   msdn microsoft com en-us library ms682450 v vs 85  aspx and can set the parameter  lpServiceStartName   to  NT AUTHORITY NetworkService   This will start your service under  Network Service  account and then you are done   You can also try by making the service as interactive by specifying SERVICE INTERACTIVE PROCESS in the servicetype parameter flag of your CreateService   function but this will be limited only till XP as Vista and 7 donot support this feature    Hope the solutions help you   Let me know if this worked for you

User · Answer

ForcePush   NOTE  The newly created mapped drive will now appear for ALL users of this system but they will see it displayed as  Disconnected Network Drive  Z     Do not let the name fool you  It may claim to be disconnected but it will work for everyone  That s how you can tell this hack is not supported by M      It all depends on the share permissions  If you have Everyone in the share permissions  this mapped drive will be accessible by other users  But if you have only some particular user whose credentials you used in your batch script and this batch script was added to the Startup scripts  only System account will have access to that share not even Administrator  So if you use  for example  a scheduled ntbackuo job  System account must be used in  Run as   If your service s  Log on as  Local System account  it should work   What I did  I didn t map any drive letter in my startup script  just used net use    server share     and used UNC path in my scheduled jobs  Added a logon script  or just add a batch file to the startup folder  with the mapping to the same share with some drive letter  net use Z         with the same credentials  Now the logged user can see and access that mapped drive  There are 2 connections to the same share  In this case the user doesn t see that annoying  Disconnected network drive       But if you really need access to that share by the drive letter not just UNC  map that share with the different drive letters  e g  Y for System and Z for users

User · Answer

You ll either need to modify the service  or wrap it inside a helper process  apart from session drive access issues  persistent drive mappings are only restored on an interactive logon  which services typically don t perform   The helper process approach can be pretty simple  just create a new service that maps the drive and starts the  real  service  The only things that are not entirely trivial about this are    The helper service will need to pass on all appropriate SCM commands  start stop  etc   to the real service  If the real service accepts custom SCM commands  remember to pass those on as well  I don t expect a service that considers UNC paths exotic to use such commands  though     Things may get a bit tricky credential-wise  If the real service runs under a normal user account  you can run the helper service under that account as well  and all should be OK as long as the account has appropriate access to the network share  If the real service will only work when run as LOCALSYSTEM or somesuch  things get more interesting  as it either won t be able to  see  the network drive at all  or require some credential juggling to get things to work

User · Answer

You ll either need to modify the service  or wrap it inside a helper process  apart from session drive access issues  persistent drive mappings are only restored on an interactive logon  which services typically don t perform   The helper process approach can be pretty simple  just create a new service that maps the drive and starts the  real  service  The only things that are not entirely trivial about this are    The helper service will need to pass on all appropriate SCM commands  start stop  etc   to the real service  If the real service accepts custom SCM commands  remember to pass those on as well  I don t expect a service that considers UNC paths exotic to use such commands  though     Things may get a bit tricky credential-wise  If the real service runs under a normal user account  you can run the helper service under that account as well  and all should be OK as long as the account has appropriate access to the network share  If the real service will only work when run as LOCALSYSTEM or somesuch  things get more interesting  as it either won t be able to  see  the network drive at all  or require some credential juggling to get things to work

User · Answer

There is a good answer here  https   superuser com a 651015 299678  I e  You can use a symbolic link  e g   mklink  D C  myLink   127 0 0 1 c

User · Answer

You could us the  net use  command   var p   System Diagnostics Process Start  net exe    use K      Server  path    var isCompleted   p WaitForExit 5000     If that does not work in a service  try the Winapi and PInvoke WNetAddConnection2  Edit  Obviously I misunderstood you - you can not change the sourcecode of the service  right  In that case I would follow the suggestion by mdb  but with a little twist  Create your own service  lets call it mapping service  that maps the drive and add this mapping service to the dependencies for the first  the actual working  service  That way the working service will not start before the mapping service has started  and mapped the drive

User · Answer

You wan t to either change the user that the Service runs under from  System  or find a sneaky way to run your mapping as System    The funny thing is that this is possible by using the  at  command  simply schedule your drive mapping one minute into the future and it will be run under the System account making the drive visible to your service

User · Answer

Instead of relying on a persistent drive  you could set the script to map unmap the drive each time you use it   net use Q    share domain com share  forfiles  p Q  myfolder  s  m   txt  d -0  c  cmd  c del  path  net use Q   delete   This works for me

User · Answer

Use this at your own risk   I have tested it on XP and Server 2008 x64 R2   For this hack you will need SysinternalsSuite by Mark Russinovich   Step one  Open an elevated cmd exe prompt  Run as administrator   Step two  Elevate again to root using PSExec exe  Navigate to the folder containing SysinternalsSuite and execute the following command psexec -i -s cmd exe you are now inside of a prompt that is nt authority system and you can prove this by typing whoami  The -i is needed because drive mappings need to interact with the user  Step Three  Create the persistent mapped drive as the SYSTEM account with the following command net use z    servername sharedfolder  persistent yes  It s that easy   WARNING  You can only remove this mapping the same way you created it  from the SYSTEM account  If you need to remove it  follow steps 1 and 2 but change the command on step 3 to net use z   delete   NOTE  The newly created mapped drive will now appear for ALL users of this system but they will see it displayed as  Disconnected Network Drive  Z     Do not let the name fool you  It may claim to be disconnected but it will work for everyone  That s how you can tell this hack is not supported by M

User · Answer

Found a way to grant Windows Service access to Network Drive   Take Windows Server 2012 with NFS Disk for example      Step 1  Write a Batch File to Mount    Write a batch file  ex  C  mount nfs bat  echo  time   gt  gt  c  mount nfs log txt net use Z     your ip   netdisk folder    gt  gt  C  mount nfs log txt 2 gt  amp 1      Step 2  Mount Disk as NT AUTHORITY SYSTEM    Open  Task Scheduler   create a new task    Run as  SYSTEM   at  System Startup   Create action  Run  C  mount nfs bat     After these two simple steps  my Windows ActiveMQ Service run under  Local System  priviledge  perform perfectly without login

User · Answer

Found a way to grant Windows Service access to Network Drive   Take Windows Server 2012 with NFS Disk for example      Step 1  Write a Batch File to Mount    Write a batch file  ex  C  mount nfs bat  echo  time   gt  gt  c  mount nfs log txt net use Z     your ip   netdisk folder    gt  gt  C  mount nfs log txt 2 gt  amp 1      Step 2  Mount Disk as NT AUTHORITY SYSTEM    Open  Task Scheduler   create a new task    Run as  SYSTEM   at  System Startup   Create action  Run  C  mount nfs bat     After these two simple steps  my Windows ActiveMQ Service run under  Local System  priviledge  perform perfectly without login

User · Answer

You wan t to either change the user that the Service runs under from  System  or find a sneaky way to run your mapping as System    The funny thing is that this is possible by using the  at  command  simply schedule your drive mapping one minute into the future and it will be run under the System account making the drive visible to your service

User · Answer

ForcePush   NOTE  The newly created mapped drive will now appear for ALL users of this system but they will see it displayed as  Disconnected Network Drive  Z     Do not let the name fool you  It may claim to be disconnected but it will work for everyone  That s how you can tell this hack is not supported by M      It all depends on the share permissions  If you have Everyone in the share permissions  this mapped drive will be accessible by other users  But if you have only some particular user whose credentials you used in your batch script and this batch script was added to the Startup scripts  only System account will have access to that share not even Administrator  So if you use  for example  a scheduled ntbackuo job  System account must be used in  Run as   If your service s  Log on as  Local System account  it should work   What I did  I didn t map any drive letter in my startup script  just used net use    server share     and used UNC path in my scheduled jobs  Added a logon script  or just add a batch file to the startup folder  with the mapping to the same share with some drive letter  net use Z         with the same credentials  Now the logged user can see and access that mapped drive  There are 2 connections to the same share  In this case the user doesn t see that annoying  Disconnected network drive       But if you really need access to that share by the drive letter not just UNC  map that share with the different drive letters  e g  Y for System and Z for users

User · Answer

I can t comment yet  working on reputation  but created an account just to answer  Tech Jerk  spankmaster79  nice name lol  and  NMC issues they reported in reply to the  I found a solution that is similar to the one with psexec but works without additional tools and survives a reboot   post  Larry had made   The solution to this is to just browse to that folder from within the logged in account  ie          servername share     and let it prompt to login  and enter the same credentials you used for the UNC in psexec   After that it starts working  In my case  I think this is because the server with the service isn t a member of the same domain as the server I m mapping to   I m thinking if the UNC and the scheduled task both refer to the IP instead of hostname        123 456 789 012 share    it may avoid the problem altogether    If I ever get enough rep points on here i ll add this as a reply instead

User · Answer

You could us the  net use  command   var p   System Diagnostics Process Start  net exe    use K      Server  path    var isCompleted   p WaitForExit 5000     If that does not work in a service  try the Winapi and PInvoke WNetAddConnection2  Edit  Obviously I misunderstood you - you can not change the sourcecode of the service  right  In that case I would follow the suggestion by mdb  but with a little twist  Create your own service  lets call it mapping service  that maps the drive and add this mapping service to the dependencies for the first  the actual working  service  That way the working service will not start before the mapping service has started  and mapped the drive

User · Answer

Instead of relying on a persistent drive  you could set the script to map unmap the drive each time you use it   net use Q    share domain com share  forfiles  p Q  myfolder  s  m   txt  d -0  c  cmd  c del  path  net use Q   delete   This works for me

User · Answer

I found a solution that is similar to the one with psexec but works without additional tools and survives a reboot   Just add a sheduled task  insert  system  in the  run as  field and point the task to a batch file with the simple command  net use z   servername sharedfolder  persistent yes   Then select  run at system startup   or similar  I do not have an English version  and you are done

User · Answer

You ll either need to modify the service  or wrap it inside a helper process  apart from session drive access issues  persistent drive mappings are only restored on an interactive logon  which services typically don t perform   The helper process approach can be pretty simple  just create a new service that maps the drive and starts the  real  service  The only things that are not entirely trivial about this are    The helper service will need to pass on all appropriate SCM commands  start stop  etc   to the real service  If the real service accepts custom SCM commands  remember to pass those on as well  I don t expect a service that considers UNC paths exotic to use such commands  though     Things may get a bit tricky credential-wise  If the real service runs under a normal user account  you can run the helper service under that account as well  and all should be OK as long as the account has appropriate access to the network share  If the real service will only work when run as LOCALSYSTEM or somesuch  things get more interesting  as it either won t be able to  see  the network drive at all  or require some credential juggling to get things to work

User · Answer

A better way would be to use a symbolic link using mklink exe  You can just create a link in the file system that any app can use  See http   en wikipedia org wiki NTFS symbolic link

[windows] Map a network drive to be used by a service

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