Office 365 update location is overwritten and attempts to update fail with error code 1603.

Products

• Patch Management Solution for Windows

Issue/Introduction

Office 365 update location is overwritten and attempts to update fail with error code 1603.

Environment

ITMS 8.x

Cause

A GPO can control the following registry key which overwrites the Office 365 update URL.
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\office\16.0\common\officeupdate

Resolution

1. Change the GPO affecting the registry key or if the GPO is no longer in use, delete the old registry keys from the following location.
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\office\16.0\common\officeupdate

NOTE: Make an export backup of the registry keys before deleting.

2. Review the GPOs under "Local Group Policy Editor>Local Computer Policy>Administrative templates>Microsoft Office 2016>Updates" for the affected computer.