Wednesday, August 1, 2018

Outlook: IMAP - The account name is already being used. Choose another name whwn channging account option

Symptoms: 
Changing Outlook IMAP account / reconfigure or enabling "Purge deleted messages when leaving IMAP folders" failed with

"The account name is already being used. Choose another name"

Cause: 
Corrupt Outlook Profile

Solution:
Recreate Outlook Profile

Note:
There is quick way to enable "Purge deleted messages when leaving IMAP folders" using regedit (may applicable for other option) without recreate profile

HKEY_CURRENT_USER/Software\Microsoft\Windows NT\Current Version\Windows Messaging Subsystem\Profiles\Outlook\9375cff0413111d3B88A00104B2A6676 (may be different, find with multiple subkeys).

In every subkey check by double clicking "Account Name" to get readable account

create/set DWord key EnablePurgeOnSwitch value = 1