Teams Tab App Not Working On External Web Server

Question

Hi,&nbsp;I'm trying to deploy my Teams tab app on an external Tomcat web server but Teams is not rendering the tab. i.e. the tab is blank.&nbsp;However, when I use ngrok and deploy the same Teams tab app in Tomcat on my localhost server, it works fine. I have used the Wireshark packet capture tool to verify the external Tomcat server is receiving and responding to the messages from the Teams app.Do I need to configure anything in the manifest.json file and/or Azure AD to allow my Teams tab app to&nbsp; handle TLS or to recognize the external server? Is there a difference between ngrok and Tomcat in how TLS handled?&nbsp;Is there a log file generated from rendering my Teams tab app? If so, where is it located?&nbsp;Thanks!George&nbsp;&nbsp;

nikitha-msft · Answer

George71&nbsp;- Did you add valid domain to the manifest?

george71 · Answer

Nikitha-MSFT&nbsp;I did add a valid domain to the manifest.json file. Here is my manifest file:{&nbsp;&nbsp;&nbsp;&nbsp;"$schema":&nbsp;"https://developer.microsoft.com/en-us/json-schemas/teams/v1.7/MicrosoftTeams.schema.json",&nbsp;&nbsp;&nbsp;&nbsp;"manifestVersion":&nbsp;"1.7",&nbsp;&nbsp;&nbsp;&nbsp;"version":&nbsp;"1.0.0",&nbsp;&nbsp;&nbsp;&nbsp;"id":&nbsp;"243244b2-5499-4442-864b-9e6be093ebbf",&nbsp;&nbsp;&nbsp;&nbsp;"packageName":&nbsp;"com.gctest",&nbsp;&nbsp;&nbsp;&nbsp;"developer":&nbsp;{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"name":&nbsp;"GcTest",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"websiteUrl":&nbsp;"https://www.microsoft.com",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"privacyUrl":&nbsp;"https://www.microsoft.com/privacy",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"termsOfUseUrl":&nbsp;"https://www.microsoft.com/termsofuse"&nbsp;&nbsp;&nbsp;&nbsp;},&nbsp;&nbsp;&nbsp;&nbsp;"icons":&nbsp;{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"outline":&nbsp;"contoso20x20.png",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"color":&nbsp;"contoso96x96.png"&nbsp;&nbsp;&nbsp;&nbsp;},&nbsp;&nbsp;&nbsp;&nbsp;"name":&nbsp;{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"short":&nbsp;"GENCom&nbsp;App",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"full":&nbsp;"GENCom&nbsp;App&nbsp;for&nbsp;Microsoft&nbsp;Teams"&nbsp;&nbsp;&nbsp;&nbsp;},&nbsp;&nbsp;&nbsp;&nbsp;"description":&nbsp;{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"short":&nbsp;"App&nbsp;for&nbsp;Microsoft&nbsp;Teams",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"full":&nbsp;"This&nbsp;app&nbsp;provides&nbsp;an&nbsp;innterface&nbsp;to&nbsp;make&nbsp;GENCom&nbsp;voice&nbsp;calls&nbsp;from&nbsp;within&nbsp;Microsoft&nbsp;Teams."&nbsp;&nbsp;&nbsp;&nbsp;},&nbsp;&nbsp;&nbsp;&nbsp;"accentColor":&nbsp;"#60A18E",&nbsp;&nbsp;&nbsp;&nbsp;"staticTabs":&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"entityId":&nbsp;"com.gctest.findcontacts",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"name":&nbsp;"Contact&nbsp;List",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"contentUrl":&nbsp;"https://172.29.120.99/gctest/findcontacts.html",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"scopes":&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"team"&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;]&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;&nbsp;],&nbsp;&nbsp;&nbsp;&nbsp;"permissions":&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"identity",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"messageTeamMembers"&nbsp;&nbsp;&nbsp;&nbsp;],&nbsp;&nbsp;&nbsp;&nbsp;"validDomains":&nbsp;[&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"172.29.120.99"&nbsp;&nbsp;&nbsp;&nbsp;]}

nikitha-msft · Answer

George71&nbsp;- IP address will not support for the tab. Valid you please try adding the web domain instead of IP address? Try if that helps.

george71 · Answer

Nikitha-MSFTThanks!&nbsp;

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Teams Tab App Not Working On External Web Server

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