Outlook 2016 crashing on computers with Connect to Outlook and watched folders.-1520537024

This is a bit of a weird bug to try to describe, but we have tried a lot of fixes already. 

Note: Disabling Connect to Outlook fixes the problem or using safemode fixes the problem.

We are running DocuWare 6.12.0.609, this did work before we applied the latest hotfix.
This past weekend I was in the process of backing up one of our Exchange accounts, as we usually don't let it grow past 3 months of data. During this time, several folders were backed up and removed from the exchange server. My system is currently the only one who can access the larger folders. All of the affected folders have close to 5000+ emails with attachments Note only 4 of 14 or so crash Outlook. It is noticeable by verifying the file size of the OST file that the systems are not syncing completely on all the other machines. Current OST file should be 7.8GBs, while others have varying sizes from 5GB to 16GB depending on when it last synced. 

System setups
Windows 7 64 bit w/32 bit Office 2016 build 1802 (latest) Connect to DocuWare v6.12.618 (3 systems)
Windows 7 64 bit w/32 bit Office 2016 build 1802 (latest) Connect to DocuWare v6.12.626 (4 systems)

Windows 10 64 bit w/32 bit Office 2016 build 1801 Connect to DocuWare v6.12.618 (0 systems, upgraded to 1802)
Windows 10 64 bit w/32 bit Office 2016 build 1802 (latest) Connect to DocuWare v6.12.618 (0 systems, upgraded to 626)
Windows 10 64 bit w/32 bit Office 2016 build 1802 (latest) Connect to DocuWare v6.12.626 (0 system, upgraded to 64 bit Office)
Windows 10 64 bit w/64 bit Office 2016 build 1802 (latest) Connect to DocuWare v6.12.626 (1 systems)

Windows 10 64 bit w/64 bit Office 2016 build 1802 (latest) Connect to DocuWare v6.12.626 (Working System)

All systems excluding the last do not work when accessing the larger folders. All systems work when enable safe mode. Regardless of which version of Office, note no other addins are enabled during testing, just Connect to Outlook 6.12.xxx

We narrowed it down to the configuration for a watch folder called 7501 that was connected to the one of our admin's user names. They have access to several of our exchange accounts, but it was tired directly to their pop3 account. Connect to Outlook, made 7501 folders in all email inboxes on their account. Since several of the exchange accounts are shared. Connect to outlook tied to our support exchange account. From here all parties using this one exchange account were affected (running Outlook 2016) by not being able to get being able to view the larger folders.

We have tried to compact the databases, allow them to sync for several days to get caught up with the large amount of changes. This had no affect.
We have reinstalled DocuWare Apps, Reinstalled Office 2016, upgraded Office from 32 bit to 64 bit.
We have reset the user's Outlook Profiles, we have deleted the exchange account and re-enabled it.
We have disabled cache mode, and re enabled it.

All of this causes the same error when Connect to DocuWare is setup to watch a folder in configurations. Disabling the Watch folder doesn't seem to stop the error from happening.

I doubt very much that the problem is really in Connect to Outlook. Those watched folders are huge, and considering the C2O is simply an Outlook plugin, I have no doubt that the resources available to a plugin are insufficient on a 32 bit installation. This is born out where you indicate the crash does not happen in Safe Mode and the last 2 referenced Outlook installations are 64 bit, which have access to more system memory.
Can you try installing 64 bit Outlook on one of the machines currently running 32 bit Outlook? If is does not crash you have the answer.
Regardless, I have to wonder why the watched folders are so huge, and whether you would be better with Connect to Mail? But without a use case it is hard to advise further.

Phil Robson
Senior Director Support Americas

Phil,

One of the machines we tested is the below lines. Upgrading to 64bit had no affect. It still crashes. Upgraded office had no affect.

Windows 10 64 bit w/32 bit Office 2010 Connect to DocuWare version unknown

Windows 10 64 bit w/32 bit Office 2016 build 1801 Connect to DocuWare v6.12.618 (0 systems, upgraded to 1802)

Windows 10 64 bit w/32 bit Office 2016 build 1802 (latest) Connect to DocuWare v6.12.618 (0 systems, upgraded to 626)

Windows 10 64 bit w/32 bit Office 2016 build 1802 (latest) Connect to DocuWare v6.12.626 (0 system, upgraded to 64 bit Office)

Windows 10 64 bit w/64 bit Office 2016 build 1802 (latest) Connect to DocuWare v6.12.626 (1 systems)

The watched folder is very small and auto deletes upon processing. it usually has no more than 40-50 emails ranging from 20-200kb each. The folders that are crashing are not supposed to be watched even.

Edit: Note this machine was originally Office 2010 32bit and still had these issues.

At this time I have no idea what the problem might be. This issue cannot be resolved in the forum. Please open a Support Request so that the behavior can be investigated.

Phil Robson
Senior Director Support Americas

I have updated my last post to include that this also happened on Outlook 2010, before we upgraded to Office 2016.

I concour this is happening to us as well, just opened a support ticket, did you ever find a resolution???