Zoom's document states you must have a Reply Url Set: https://support.zoom.us/hc/en-us/articles/115005887566-Configuring-Zoom-with-Azure#h_04f20f53-96b6-4877-9b14-b1a862fe34c8
For Identifier (Entity ID), enter your vanity URL without https://.
Eg. yourvanityurl.zoom.us
For Reply URL, enter https://*.zoom.us/saml/SSO
For Sign on URL, enter https:// followed by your Vanity URL.
Eg. https://yourvanityurl.zoom.us
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Hello @afield1235 ,
Thank you for your feedback! We will review and provide an update as appropriate.
@chetansriv for tracking
Wildcards are not supported:
Reply URL (Assertion Consumer Service URL)
The default reply URL will be the destination in the SAML response for IDP-initiated SSO
https://*.zoom.us/saml/SSO
Wild cards * are not supported.
Wildcards are not supported:
Reply URL (Assertion Consumer Service URL)
The default reply URL will be the destination in the SAML response for IDP-initiated SSO
https://*.zoom.us/saml/SSO
Wild cards * are not supported.
Seeing the same issue. I have a feeling the "no wild cards" thing is new because I'm pretty sure I've set it that way in the past. Not sure what to do for Zoom setup now as they want a wild card in the Reply URL field.
I've also run into this. Commenting to track.
That setup works and is in production. Not sure what you mean by it's not supported. What should we be using then? There shouldn't be discrepancies between documentation. I don't think I've done ONE Azure AD SSO implementation was 100% accurate in terms of documentation. Very frustrating..
It looks like Zoom updated their documentation:
https://support.zoom.us/hc/en-us/articles/115005887566
Reply URL doesn't require a wild card anymore.
I believe my original point still stands, everyone got sidetracked with the discussion on wildcards. The Azure Documentation does not include any mention of Reply URLS, but mentions all other values, while the Zoom documentation states the need for a Reply URL.
Microsoft, please update your documentation to include this.

@chetansriv for tracking.
Please close this PR, we resolved the issue in another PR which is merged now _https://github.com/MicrosoftDocs/azure-docs-pr/pull/125329_
Most helpful comment
Seeing the same issue. I have a feeling the "no wild cards" thing is new because I'm pretty sure I've set it that way in the past. Not sure what to do for Zoom setup now as they want a wild card in the Reply URL field.