“Bring your AI to work” is here: Microsoft edition - What Multiple Account Access to Copilot means

Multiple Account Access to Copilot On October 1. 2025 Microsoft released a blog post explaining how employees now can use Copilot from their personal 365 plans to work on organizational data. This is of course, an extension of the already existing "Multi account" feature that was released for corporate accounts a "couple of months" ago. In other words, “bring your own Copilot” is now a real thing in Word, Excel, PowerPoint, Outlook, and OneNote on desktop and mobile, with enterprise protections intact. “Bring your AI to work” is an important topic, and banning AI altogether might not be the answer. Whether sanctioned or shadow, AI has already entered everyday knowledge work. Microsoft’s new multi‑account access offers a safer path where employees can use Copilot from their personal Microsoft 365 subscriptions on work files, while the file’s access, auditing, and compliance still flow through the work identity and tenant. That’s better than users copy‑pasting sensit...

Synchronization from h***

I recently acquired a HTC Touch phone, with windows mobile. Lucky me, I thought. Now I can sync users and more across pc’s, Windows Live and my account on the exchange server. If only I can find the “avoid duplicates” setting on the sync -tool. I did, and initiated sync with Exchange.

So far, so good. Then I initiated sync with Windows Live… WooooHaa?!? What happened? Almost every contact got duplicated, and I could not tell which contact was from which source. Trying to delete one contact in one system sometimes removed a duplicate, and sometimes didn’t. I also ended up with some contacts in Exchange, not present in WL and vice versa. What a mess!

I ended up with deleting every contact, everywhere. Then fetching my Google contacts and importing them to exchange (It turned out WL contacts are not synchronized to exchange through the HTC, and they use different fields to identify weather a user is a duplicate or not).
Lesson learned:

1. Always have a good backup (I am glad I had mine in place. Recreating 200+ contacts is no small deal)
2. Be careful to initiate replication across platforms. Make sure you understand the limitations and restrictions of the software you use.