I'm resposting from this thread to hopefully create more attention for this problem: https://answers.microsoft.com/en-us/outlook_com/forum/outlk_win-outtop_new-outsub_ofb/outlook-error-message-someh...
Hello,
We have the same problem. We are using Horizon 2406 with FSLogix in Instant Clone but with persistent machines. We try to migrate our users on the new Teams but after a few days of use, the users have this error “48v35”. Restarting Windows solves the problem.
Except restarting the machine or forcing log off/log on doesn't actually fix it in the long term. It will come back for people in that VM eventually.