Upgrade Enterprise site with only web adaptor to 10.9.1

[KevinPiraino2]

Looking to get some guidance on upgrading an ArcGIS Enterprise site from 10.7.1 to 10.9.1 when the existing site only uses a single web adaptor. As it stands the Portal and Server site both share the same web adaptor (arcgis) and as dictated by ESRI documentation, this isn't supported anymore. My thought was to follow the below workflow to complete this upgrade, but was looking for any additional guidance or advice. 

1. Unregister existing web adaptor with ArcGIS Server

2. Upgrade Portal

3. Uninstall/Re-install web adaptor for Portal --> use "arcgis" name

4. Upgrade ArcGIS Server (AGS)

5. Install web adaptor for AGS --> use "server" name

6. Upgrade datastore

[MarceloMarques]

@EricKriener  - if you open the 10.9.1 doc link below and look the steps under "Perform an upgrade of your portal deployment", you will see that it asks to uninstall the Web Adaptor before doing the upgrade.

Upgrade your ArcGIS Enterprise portal—ArcGIS Enterprise | Documentation for ArcGIS Enterprise (10.9.1)

But the 11.2 documentation this was rectified and now under "Perform an upgrade of your portal deployment", you will see that it asks to uninstall / install the Web Adaptor after the upgrade.

Upgrade Portal for ArcGIS—ArcGIS Enterprise | Documentation for ArcGIS Enterprise  (11.2)

[EricKriener]

so what's the correct way? I've been doing it after since ArcGIS Server was a thing...

[MarceloMarques]

@EricKriener  I don't think they is a definitive answer once the documentation has conflicting information, But I have been doing this way for many years, uninstall and install the Web Adaptor after the Upgrade and never had issues, but I know of folks that followed the documentation to the letter and uninstall the Web Adaptor before the Upgrade and also never had issues.