Reserve Calendar Time for Bookings
How do you block space out on your personal calendar such that it's only available to Microsoft bookings, and shows busy to others in your organization? I've created a personal bookings page with custom timeslots--that's working just fine. The problem is that people in my org who can see my calendar are sending calendar invites for those same timeslots, making them no longer available to the bookings page. If I add my own events to my personal calendar to mark time as busy, those slots also disappear from the bookings page. How can I adjust things such as to reserve time exclusively for Microsoft bookings and no other users at my org?
Outlook for Android not syncing contacts automatically
Hi Everyone, I can't get Outlook on my android phone (Samsung S9) to sync contact automatically with my Exchange (Microsoft Hosted Exchange) account. If I add a contact on the Outlook app running on my Windows 10 laptop, I can see it if I look on the Outlook for web. I have checked the usual settings on my phone: The only way to get the contacts to update is to reset the account: Contacts that I add on my phone (Exchange account) do not sync back to the online account. Outlook on my phone syncs emails with the same account normally. I've tried clearing data / cache, and even taken the extra step of uninstalling and reinstalling on my phone but it makes no difference Any suggestions gladly welcomed!
User cannot rename categories even when being the owner
Hi guys, I have a user that cannot rename categories in a mailbox whilst being the owner. As you can her permission level is set on owner. And yet the rename is greyed out: User says she was able to rename just some time ago, but when she tried on 17/04/2026 she couldn't. Anyone has any ideas?
ARC verification fail (40) on specific Exchange Online frontends - recurring issue
Hello, We are observing recurring arc=fail (40) errors on messages forwarded through Exchange Online, caused by specific frontend servers. The same messages pass ARC verification correctly on other providers (Google, etc.). Affected frontends identified so far: CH2PEPF0000013F.namprd02.prod.outlook.com - build 15.20.9700.17 (March 14, 2026) CH3PEPF0000000B.namprd04.prod.outlook.com - build 15.20.9769.17 (April 6, 2026) Both share the same build suffix .17. The signing implementation on our side has been cryptographically verified as correct and RFC 6376 compliant. The issue has also been reported on the IETF ietf-smtp mailing list with full technical analysis. Cryptographic analysis shows the failing servers append a spurious trailing \r\n to the last header before computing the verification hash, violating RFC 6376 Section 3.7. Is there a pattern with .17 frontend builds and ARC verification? Reagards VittorioImproving How Outlook Classic Handles Reactions
A fix due in May 2026 will make sure that the Outlook classic client will handle Outlook reactions properly if the reactions are blocked. Of course, if tenants don’t like responding to email with an emoji, they can create a transport rule to insert the x-ms-reactions header. Detecting the header is an instruction to Outlook clients to suppress reactions that Outlook classic has been ignoring up to now. https://office365itpros.com/2026/04/17/outlook-reactions-classic/Mailbox for Service Account (exchange online)
Hi Our organisation isn't ready to move to Exchange Online yet, though we have Office 365 e3 licencing. I need to create a service account that can send emails via Outlook 365 for use In Power Automate. The documentation I have seen for adding a mailbox to an existing AAD user requires assigning an exchange licence to the account via the licence portal. I can't see any such licences though we do have e3 licencing which are visible that I assume covers this? Unfortunately the admin who did the original configuration has moved on and I don't have a global admin role so have to go through a support team that can't help me with my lack of knowledge in the area! Any advice would be very much appreciated as what ( i think) should be a simple task has taken a lot of time to try and get to the bottom of! Thanks, Dale.
