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Blocklists - Microsoft - Microsoft Teams

13.107.64.0/18 # Microsoft Teams.
52.112.0.0/14 # Microsoft Teams.
52.120.0.0/14 # Microsoft Teams.

NOTE: These IP Ranges may change.

*.microsoft.com
*.microsoftonline.com
*.teams.skype.com
*.teams.microsoft.com
*.sfbassets.com
*.skypeforbusiness.com

References