Users get a Microsoft credential prompt in the Outlook client. This does not matter when you restart Outlook or create a new Outlook profile. It keeps prompting for the Office 365/Microsoft 365 credentials. But, the mailboxes are not in the…
How to change default mailbox language for a single user or multiple users? There are users in the organization that have a different mailbox language, and they want to change that. You can send them instructions explaining how to set…
Microsoft listened and added support to send from alias address in Office 365/Microsoft 365. However, the Send as Alias feature will only work for Exchange Online mailboxes and does not work for Exchange on-premises mailboxes. This article will show how…
Since Exchange Server 2016 CU21 and Exchange Server 2019 CU10, users complain that there are Outlook problems. The Outlook application freezes and nothing helps until the Internet Information Services, or the Exchange Server is completely restarted. However, when the users…
When you create a Teams meeting in Outlook for another user, you get the error: Looks like you don't have permission to schedule meetings for this account. Talk to the owner to get permission and try again. Why is this…
We have a hybrid deployment between the Exchange on-premises organization and Exchange Online organization. The delegate permissions are set for the user to create Teams meetings. When we run Outlook and create a Teams meeting for other Exchange on-premises users,…
Hybrid Modern Authentication (HMA) is implemented in the on-premises organization. This way, the users with an on-premises mailbox will use modern authentication instead of basic authentication. It's great because from now on, they will use Azure AD Conditional Access policies.…
You like to mark all messages as read in Outlook. The question is if it's possible to mark all emails in all folders as read in Outlook? The answer is Yes. This article will teach you how to mark all…
The recipient is receiving Winmail.dat attachment instead of a PDF attachment when sent from an Office 365 mailbox. How to fix Winmail.dat attachment from showing up, and why is it happening? In this article, you will learn how to prevent…
You are migrating mailboxes to Office 365. After the mailbox migration finished, you start Microsoft Outlook. Outlook is stuck on the loading screen for minutes and then prompting for password. In this article, you will learn why Outlook prompts for…