Disclaimer: The information presented here is unofficial and is not endorsed or supported by ServiceNow. This has been published here in good faith that it can help someone.

First ensure that you are at least on New York release Patch 1 and Notify is installed there (ref).

Next you need to install two Store apps :-

1. Zoom Spokes – https://store.servicenow.com/sn_appstore_store.do#!/store/application/5192d6d90b4233006237818393673aea/1.0.2
2. Notify Zoom Connector – https://store.servicenow.com/sn_appstore_store.do#!/store/application/613f88810b0233008e64aabcb4673a50/1.0.3

Now follow the video below.

The video should be comprehensive enough to get you started.

Known issues:

• The Zoom integration will not work when run as non-admin user (PRB1360915) – The workaround is to make use of the Zoom integration as admin user at least once. Make sure to Create/End Conferences, Add participants to it, etc. The issue is that all Zoom Spoke Actions need to be run as admin at least once. When done then you can use it normally without admin privileges. This issue has been addressed in Orlando and will probably be backported to some New York later patches.
• Misleading error message when OAuth expires (PRB1360395) – If the OAuth has expired or has not even been fetched, then trying to use the integration will show an error like – ‘Meeting host must have a valid Zoom account’. The issue will be fixed in next version on “Notify Zoom Connector”. Current version is 1.0.3.