Google Workspace Sync for Microsoft Outlook (GWSMO) v4.3.73.0 Crashing Outlook with Contacts Sync enabled.

Google Support are aware of the issue and reportedly working on a fix.Issue has been observed on both Windows 10 and 11 with the latest GWSMO release (v4.3.73.0).

It's been reported but not confirmed by Google, that the latest update of GWSMO uses a new Contacts API. GWSMO users have observed that disabling the contact sync, resolves the crashing. It's unclear if the unhandled exception (crash) resides in GWSMO or Outlook.

There's 2 options to work around the crashing issue. These are temp workarounds until the official fix from Google arrives.

Option 1

https://support.google.com/a/answer/9833647
Prior to loading Outlook, disconnect the PC from the Internet. This will stop the syncing and subsequent crash.

1. Open GWSMO from the system tray and turn off the contacts sync.
2. Turn sync OFF for data types
1. Click GWSMO icon in your Microsoft Windows taskbar notification area.
   
   If you can't find the icon, it might be hidden in the overflow area. To view all icons, click the up arrow on the taskbar.
3. Select Turn sync modules on/off.
4. Uncheck the box beside the contacts sync module.
5. Click OKOK.

Alternative Option

Registry for automatic wider deployment
https://support.google.com/a/answer/1041455#sync&zippy=%2Cturn-off-sync-for-a-specific-product

Run each of the following commands to add a registry value to disable the Contact Sync module in GWSMO.

• reg add “HKEY_CURRENT_USER\Software\Google\Google Apps Sync” /v SyncFlagsEnabled /t REG_DWORD /d 0x00000001
  
  
• reg add “HKEY_CURRENT_USER\Software\Google\Google Apps Sync\ContactsSync” /v DownloadEnabled /t REG_DWORD /d 0x00000000
  
  
• reg add “HKEY_CURRENT_USER\Software\Google\Google Apps Sync\ContactsSync” /v UploadEnabled /t REG_DWORD /d 0x00000000

Uninstall Google Workspace Sync for Microsoft Outlook (GWSMO)

Occasionally the GWSMO installer refuses to uninstall or reinstall. Thankfully a rare problem, but one that has persisted from the GASMO, then GSSMO through to GWSMO. This post will talk about how to manually uninstall Google Workspace Sync for Microsoft Outlook (hereafter referred to as GWSMO).

For one reason or another you have decided to uninstall GWSMO or attempted to reinstall to over come some issue.

Error: MAPI was unable to load the information service C:\Program Files (x86)\Google Apps Sync\gsync.dll

This is particular common where problems have persisted even after you've run through "Set up a Google Apps Sync user" and created a new Outlook profile for your Google Workspace email account.


Where the uninstall fails via add/remove programs, here's how to manually remove GWSMO components, to overcome errors that block reinstallation

1. Ensure Outlook is not running
2. Rename the folder C:\Program Files (x86)\Google\Google Apps Sync
   ie. Append '.old' to the folder name
3. Rename the folder C:\Users\%username%\AppData\Local\Google\Google Apps Sync
   ie. Append '.old' to the folder name
4. Rerun the installer and configure GWSMO.
5. Upon completion can confirming all is operating as required, you can safely delete the renamed folders.