[excel] Can two or more people edit an Excel document at the same time?

No, sadly:

The Excel 2010 client application does not support co-authoring workbooks in SharePoint Server 2010. However, the Excel client application does support non-real-time co-authoring workbooks stored locally or on network (UNC) paths by using the Shared Workbook feature. Co-authoring workbooks in SharePoint is supported by using the Microsoft Excel Web App, included with Office Web Apps

From Co-authoring overview (SharePoint Server 2010)

...and not for SharePoint 2013 either. Though it works for pretty much all other Office documents. Go figure.

Examples related to excel

Python: Pandas pd.read_excel giving ImportError: Install xlrd >= 0.9.0 for Excel support Converting unix time into date-time via excel How to increment a letter N times per iteration and store in an array? 'Microsoft.ACE.OLEDB.16.0' provider is not registered on the local machine. (System.Data) How to import an Excel file into SQL Server? Copy filtered data to another sheet using VBA Better way to find last used row Could pandas use column as index? Check if a value is in an array or not with Excel VBA How to sort dates from Oldest to Newest in Excel?

Examples related to sharepoint

SharePoint 2013 get current user using JavaScript "Object doesn't support this property or method" error in IE11 How to open SharePoint files in Chrome/Firefox Powershell Error "The term 'Get-SPWeb' is not recognized as the name of a cmdlet, function..." Error :The remote server returned an error: (401) Unauthorized Best way to resolve file path too long exception Could not load file or assembly '' or one of its dependencies Reasons for a 409/Conflict HTTP error when uploading a file to sharepoint using a .NET WebRequest? CAML query with nested ANDs and ORs for multiple fields How to pass credentials to httpwebrequest for accessing SharePoint Library

Examples related to sharepoint-2010

Error :The remote server returned an error: (401) Unauthorized Could not load file or assembly '' or one of its dependencies exceeds the list view threshold 5000 items in Sharepoint 2010 Can two or more people edit an Excel document at the same time? Solving SharePoint Server 2010 - 503. The service is unavailable, After installation