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