How to reject Emails in Office 365 they fail DMARC
EASYDMARC had an interesting blog post about DMARC handling with Microsoft 365. DMARC and Microsoft : What is Happening?https://easydmarc.com/blog/dmarc-and-microsoft/ You…
Set up DomainKeys Identified Mail (DKIM) on Exchange on-premise
Out of the box on-premise Exchange Server doesn’t support DKIM signing. To deploy DKIM for your on-premises Exchange Servers you…
Set up Exchange on-premise to relay outbound Emails to the Internet via Exchange Online Protection (EOP)
If you had an Exchange Hybrid configuration, you can route also outbound email messages from your on-premise mailboxes through Exchange…
Restore deleted Microsoft 365 Hybrid User
If you need to restore a Microsoft 365 hybrid user account which was synced from on-premises Active Directory to Azure…
Renew Edge Subscription in Exchange Server after Cumulative Update
Last weekend I was updating my on-premises Exchange Servers with the new cumulative update and therefore had to renew the…
Enable External Users for booking and adding Exchange Room Calendars
If you want to allow external users for booking and adding your Exchange room calendars in Outlook, you have to…
Bypass Exchange Room Mailbox Delegation for specific Users
You can enable in Exchange delegation for booking requests against room mailboxes as follows. In this case each time a…
Appendix – Azure AD Connect Sync Errors Detected – Large Attribute – Extension thumbnailPhoto
First I want to mention and warn that this post will not show how to resolve the issue with the…
Azure AD Connect Sync Errors Detected – Large Attribute – Extension thumbnailPhoto
The on-premises Active Directory attribute thumbnailPhoto can store the users photo. This photo can then be used by applications like…
Exchange/Outlook Download Offline Address Book Error 0x80190194
In case you will get during an attempt to download the offline address book from Exchange Server the following error…
