If you try a full crawler on the sharepoint server and got the message "paused by system" try to:
1.) Index Reset the index via (Index Reset) on the right side
2.) Start a Full Crawl again
[RESOLVED] You do not have the permission to send the message on behalf of the specified user
How to fix “The program can’t start because MSVCR110.dll is missing from your computer.” error on Windows
[RESOLVED] Exchange 2013/2016 hub transport Mail.que file large in size
[RESOLVED] The Open Procedure for service XXX in DLL "C:\Windows\System32\XXX.dll" failed. Performance data for this service will not be available. The first four bytes (DWORD) of the Data section contains the error code
[RESOLVED] "The client and server cannot communicate, because they do not possess a common algorithm"