Fix: Microsoft Live Mail Error Code 0x800CCC91 in Windows 10/11
How to Fix the Troubleshoot Outlook Error code 0x800CCC91:
To fix the troubleshoot Outlook error 0x800CCC91is following three methods and explain them briefly.
Method 1: Fix System Integrity Issues
open Run Window and enter the Outlook/safe then click Ok then start Outlook in Safe Mode.
After that Open the Run Window and enter the cmd then click OK.
When the Command Prompt window opens, type SFC /scan now command and hit Enter.