DNS Configuration for SharePoint Apps

When you trying to add an app from store you might get below error. In order to fix this there are two things to be done.

Task 01. Configure App Managements and Subscription Settings service in SharePoint

Task 02. Configure DNS server to support app URLs

Below blog post will be focused on Task 02 where you configure DNS record in DNS server.

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  • Open DNS using MMC then right click your domain and select add new CNAME

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  • Once you got prompted to enter record details add *.app as the alias name and as FQDN of target host as your domain name (in my case its silab.int)

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  • After successful addition of DNS you will find the record as below.

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  • Now from the DNS end you are ready to go. Verify the entry by ping blablablaa.app.silab.int

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  • Make sure you configure the App Management and Subscription Settings services (both) in SharePoint before adding the app URLs.

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Customize SharePoint URL using AAM and DNS

1. Configure DNS

  • Open DNS Manager
  • Navigate to respective forward lookup zone.
  • Create a CNAME record by right clicking  in the zone and selecting “New Alias (CNAME)

Select relative host record of the CNAME.

CNAME_Browse

Once you add the CNAME you can see an entry as below.

CNAME_Entry

  • Update Group Policy

Make sure you run a Group Policy update after adding the record.

GPUpdate

  • Check connectivity from CNAME record

And then you can check whether the CNAME is being resolved.  You can monitor that CNAME is being resolved.

pingToCNAME

2. Configure IIS

If the web application is hosted in port 80 you don’t have to edit the IIS host header as you will be redirected to port 80 when enter the CNAME.

If you are using a different port other that 80 you might have to IIS website.

  • To add an entry right click the web site in IIS manager, then select edit bindings.

IIS_EditBindings

  • Add Host name and Port. Note that you should CNAME record and the Host Name should be identical.

IIS_AddBinding

3. Add Alternate Access Mapping in SharePoint Central Administration

Central Administration -> Application Management -> Configure Alternate Access Mapping -> Edit Public URLs

Select the web Application, then add the URL to Preferred zone.

ADDAlternateAccessmapping

Now you can access SharePoint site by entering the Customized URL (CNAME).