-------------------------
Error:
Error Message AADSTS50105 during Sign in via Microsoft 365 modern
Authentication (OAuth)
AADSTS50105: Your administrator has configured the application
to block users...
Please download our TeamViewer client in order to allow the MailStore support team a one-time only access to your system.
Premium Support
If your MailStore Server license includes Premium Support or you are using the MailStore Service Provider Edition, you are entitled to get in touch with our support team directly via phone.