Issue Reported: Application catalog error with IIS HTTP Error 503. The Service is unavailable.
Getting below error:
Step 1: Validate component found that many error reported. Refer below screen shot for reference.
Step 2: After validate verify IIS services look like application service was not running. Refer below screen shot for reference.
Step 3: Started Configmgr Service Portal Pool and validate component and web service it start working as normal.
Email: firstname.lastname@example.org, email@example.com
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