Universal Links failing for some users but working for others

Question

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Hi, We are facing an issue where Universal Links are working for most users but failing for some of our clients. For affected users:

Links open in Safari instead of the app, or Universal link routing does not work as expected

For other users:

The same links open the app correctly

What we verified

Associated Domains capability is configured correctly AASA file is valid and accessible App configuration and bundle ID mapping are correct AASA: https://www.gartner.com/apple-app-site-association

Issue Since the problem is only affecting a subset of users, we are unable to:

Reproduce the issue consistently Identify when or why the association breaks

Ask Has anyone experienced:

Universal Links failing only for certain users/devices?

What are the possible causes and how can we debug or proactively identify the root cause in such cases?

Any guidance would be helpful. Thanks!

Answer 1

DTS Engineer OP

Apple

2h

Thank you so much for the post.

To start I would like to let you know the location for the AASA is incorrect AASA: https://www.gartner.com/apple-app-site-association

I recommend that you review the Universal Tech Note, which provides guidance on the appropriate hosting location for the AASA file.

Example: https://example.com/.well-known/apple-app-site-association

Tech Note: TN3155: Debugging universal links | Apple Developer Documentation

I also recommend to follow the guidelines and use the troubleshooting in that tech note as well.

Hope this helps.

Albert  WWDR