Problem Statement/Rationale

Compass can not connect to an Atlas cluster with SRV connection string and X509 certificate.

Encountered in

Compass 1.27.1

MongoDB 4.4.6 (Atlas)

Steps to Reproduce

1. Add a database user with Certificate authentication
2. In Atlas, click on the connect button for the cluster
3. Click connect using MongoDB Compass
4. Copy the connection string and remove username and password
5. Paste connection string into compass
   Example: mongodb+srv://TESTCLUSTER.abcde.mongodb.net/
6. Click Fill in connection fields individually
7. Fill in the remaining fields to connect with X509: Authentication, SSL, Certs
8. Click Connect

Expected Results

Compass should connect to the cluster with the given X509 certificate

Actual Results

Compass outputs the following error:

[object Object] can only have authSource set to '$external'

Additional Notes

This can be worked around by adding

&authSource=$external

to the connection string before filling in the individual connection fields.