Outlooks 2016 MAPI 1.0 [4C2]

[adventech_gleiser]

PROBLEM:
After performing an Outlook migration from 2007 to 2013/2016, we had some users get the following error when opening Outlook 2013/2016

Outlook MAPI 1.0 Error

The time limit for logging on was reached while waiting for system resources. Try Again. MAPI 1.0 [000004C2]

When they went into Control Panel > Mail or Mail (32-bit) they got the same error...

SOLUTION:

The fix is to remove all Mail Profiles from the registry and then create a new Profile:

1. Stop all Outlook processes in Task Manager.
2. Open Regedit
3. Navigate to the following:
HKEY_CURRENT_USER > SOFTWARE > Microsoft > Office > 16.0 > Outlook > Profiles
4. Delete all Folders under the Profiles key:
Outlook Profile Regedit
5. Close Regedit
6. Open Control Panel and go to Mail or Mail (32-bit)
7. Create a new Profile

Now Outlook will work properly.