The limit for logging reached while waiting for system resources. Try again. MAPI 1.0 [000004C2]

Ran into this one today. After some Googling, found a lot of overly complicated “fixes” that seemed more like band-aids. Luckily, updating Office resolved the issue! ANother alternative was to start Outlook in Safe Mode via Outlook.exe /safe and removing or updating a Salesforce add-in.