Outlook 2019/O365 Build 13127.20408 errors when using MAPI calls

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pcunite

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Outlook version
Outlook 2019 64-bit
Email Account
POP3
When attempting to initialize MAPI, or perhaps starting Outlook with 3rd party addons, error 0x80004005 will always be returned. Then the PreFirstRun dialog box will display everyone's favorite message: "Either there is no default mail client or the current mail client cannot fulfill the messaging request. Please run Microsoft Outlook and set it as the default mail client."

The current workaround is to roll back to the August 25 Version 2007 (Build 13029.20460) build. I don't know the exact build that introduced the error, just that this one work for me.

Tell the folks in Redmond for me. Thanks!
 
When I asked Microsoft about it, they thought the no default mail client error is solved following the steps in this article:

There is a mapi bug I just don't know if it is related to this or if it was caused by that update.
 
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