see https://community.servicenow.com/community?id=community%5Farticle&sys%5Fid=146dd84adbc8b45014d6fb2439961969

promised some useful links.

ServiceNow Teams Forum on the ServiceNow Community - https://community.servicenow.com/community?id=community_forum&sys_id=626fa3501b14385417d162c4bd4bcb0c

Installing ITSM / HRSD Integration with Teams Community Document - https://community.servicenow.com/community?id=community_article&sys_id=fafac779dbc4345014d6fb243996199a

Steps to install Conversational integration - https://community.servicenow.com/community?id=community_article&sys_id=64e084bb1b2f2090ed6c9979b04bcbc7#teamsinstall

Teams FAQ including store app descriptions - https://community.servicenow.com/community?id=community_article&sys_id=146dd84adbc8b45014d6fb2439961969

Another FAQ with some troublshooting - https://community.servicenow.com/community?id=community_article&sys_id=64e084bb1b2f2090ed6c9979b04bcbc7&view_source=featuredList#teamsfaq

Steps to Test Microsoft Teams Integrations https://community.servicenow.com/community?id=community_blog&sys_id=63c73fe7db7078d023f4a345ca96199a

Although not directly Teams related this explains some of the Cross Scope issues. https://community.servicenow.com/community?id=community_article&sys_id=073eb4551b433894a59033f2cd4bcbf3

(ServiceNow )