Microsoft Outlook tosses different mistake messages and in the event that they are not settled soon, cause difficult issues. Microsoft Outlook demonstrating blunder Not implemented is one such error message that can happen now and then subsequent to hitting Send/Receive button in Outlook.
Read more here:- https://www.datarecovo.com/fix-outlook-not-implemented-error/
Disable Interfering Outlook Add-Ins
[NOTE]: This method involves disabling and enabling all the Outlook Add-ins manually.
A. Launch Outlook in Safe mode
To do this, navigate as follows:
Close Outlook>Press Windows+R>Type outlook.exe /safe>Hit Enter key
Once Outlook is launched in safe mode, follow the next step.
B. Click File>Options
C. On the page that opens, select Add-Ins>Select COM Add-ins from the dropdown>Hit Go
This opens ‘COM‘ Add-Ins page
D. Uncheck (remove tick mark) all the checkboxes, and click OK to disable all the Add-Ins
E. Next, close Outlook and launch it normally
F.Try sending an email, and see if the Outlook error “Not Implemented” is resolved.If this fixes the error, one or more Outlook Add-Ins were causing the error
G.To analyze which Add-ins are causing this error, enable one Add-In and restart Outlook, and try sending an email to see if the error occurs again
H.Repeat this process for all the Add-Ins one after the other
[NOTE]: Disable the one that resurfaces the error, and then proceed with enabling the next Add-In
Hope this works.
Regards,
Bruce