I installed almost all of my email accounts in the native Windows 10 Mail function without problems. The one that won't install is firstname.lastname@example.org. The error message is:
"Something went wrong…
We're sorry, but we weren't able to do that
Error code 0x8000ffff"
I re-tried several time, using a few of the alternate account types suggested by the Add Account feature, but this account simply won't install.
If there is no solution, I can live with it. I'll just go online to get those emails. But it would be nice to have them all on one client.
If anyone can suggest a desktop email client that will handle 8 accounts in the free version, please suggest.