Every time I edit an existing appointment, contact, task or note, a few seconds after submitting the change, it reverts back to the original state and it gets listed in the local failure folder.
It is a Microsoft Exchange account through 1and1.com. Outlook 2016. This behavior is on my desktop and my laptop.I have tried reinstalling Office 2016, creating a new profile. Removing all add-ins, using safe mode.
this does not happen when I edit online through OWA or if I edit on my phone or iPad.
Thanks for any help you can give.
Dug