FIX: You cannot send emails to Exchange Online users from Outlook

Automatically fix the undeliverable email issue (delivery has failed to these recipients) when Microsoft Services Sign In is not running or signed in. Find other automated solutions
What it fixes...
  • Microsoft Services Sign In Client not running (Microsoft Business Productivity Online Standard Suite)"
  • Microsoft Services Sign In Client not signed in (Microsoft Business Productivity Online Standard Suite)"
  • Failed delivery to recipients in Outlook nickname cache (NDR 500)
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