Outlook

Modern Authentication is enabled by default for all new Microsoft 365/Azure tenants. This authentication protocol is more secure than the legacy Basic Authentication. Microsoft plans to completely block the use…

Let’s consider some ways of exporting the Exchange Global Address List (GAL) or Offline Address Book to a text CSV file. GAL contains all email addresses of your on-prem Exchange…

There is a 20 MB limit on the maximum attachment size in the Outlook email client (including the latest versions of Outlook for Office 365 and Office 2019/2016). It doesn’t…

You can use different regional settings for user mailboxes in on-prem Exchange and Exchange Online (Microsoft 365). The mailbox regional settings define the time and date format, time zone, language…

If you face any troubles when searching for e-mails items in different Outlook versions (nothing is found, not all results are displayed, not all *.pst files used for search, etc.),…

A very common problem is when Outlook  starts asking for the user credentials, even if the correct password is specified. It looks like this: after starting Outlook successfully connects to…

A user reported a missing Mail app icon in the Control Panel on a computer running Windows 10 1903. Office 365 is installed on the computer, and Outlook is used…

In this overview I have tried to describe the main reasons why Outlook 2019/2016/2013/2010 does not display images in the email body and ways of solving this issue (actually, the…

Users of one of my customer have reported that Outlook always starts in the offline mode. Obviously, e-mails cannot be sent or received, and the Outlook icon in the system…

Several times I have come across a bug in different Outlook versions when the “Signatures” button doesn’t work. No matter how many times you click it, the Signatures window won’t…