In some cases, when you try to connect a new mailbox hosted on an on-premises Exchange Server or Microsoft 365 (Exchange Online), Outlook shows the following error after you enter…
If you face any troubles when searching for email items in different Outlook versions (nothing is found, not all results are displayed, not all *.pst files used for search, not…
Some Windows 10 users complain that when launching Office 365 apps (Outlook, Teams, Word, Excel, etc.) or Outlook 2019/2016 (with Exchange Online mailbox), a blank white sign-in screen appears when…
The Mailbox Auto-Mapping feature in on-premises Exchange Server and Exchange Online (Microsoft 365) is used to automatically connect shared mailboxes to an Outlook profile. When Outlook starts, it gets a…
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…
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…