Hello,
I have a grommunio server that I use to share some mailboxes between multiple outlook clients, currently running gromox-2.35.
I do encounter multiple Outlook synchronization problems, especially with mailboxes that are opened on multiple outlooks (various outlook versions, I have 2016, 2019 and 2021, all up to date).
So far this week:
- Empty inboxes on one outlook instance but another outlook for the same mailbox showed everything
- Mails without internet headers (internet headers were ok in webapp), so replying to an email didn't add the sender/return path email address in the "to" field
- Missing mails in one outlook instance but available on another outlook instance (and of course in the webmail)
I can resolve those issues by two ways: deleting the ost file, forcing outlook to recreate the profile, or by right clicking on the inbox folder, then clicking "clear offline items", then clicking on update folder in the ribbon.
I've repaired my outlook instances four times already this week.
On the server, I don't see any specific error logs, except some mysql errors I posted about here and here
On the outlook side, I get alot of errors in the synchronization journal like [80040803-30141506-0-533]
which basically says that the ost file cannot be opened because too many files are open (the french exact wording I have is: "Impossible d'ouvrir le fichier C:\Users<user>\AppData\Local\Microsoft\Outlook<mailaddr>.ost, car un trop grand nombre d'autres fichiers est ouvert. Fermez quelques fichiers, puis réessayez.")
This error rings a bell since my problem only occurs on outlook instances that share mailboxes, or outlook instances that open multiple mailboxes at once.
I'm a former Exchange admin, and I've never seen this error message until I begun working with grommunio, so there's not much documentation / help for these errors.
I've of course run those outlook instances with /safe
parameter in order to make sure no addon would interact somehow, but the problems still show every couple of days.
So my questions:
Is grommunio mature enough yet to have outlook open multiple mailboxes at once / share mailboxes between various outlook instances without any sync problems ?
Do any people here have those kinds of setups ? What are your experiences ? Do you encounter the same sync bugs ?
Does anyone perhaps have some advice on what to do / where to search for a root cause ?
Any input is welcome.