same symptoms here...
Version (supported version):
Name : gromox
Version : 3.7.224.1fee87e
Release : lp156.2.1
The OS is Suse 15.6 from the appliance-installation:
VARIANT="grommunio appliance"
VARIANT_ID="appliance"
VERSION_ID="15.6"
VERSION="2025.1.2"
Since the update we experience problems with connections from Outlook (webmail and activesync are working), Outlook can't connect.
Rebooting the server helps for a couple of hours.
In the Gromox-http logs there are thousands of such messages:
[2026-06-02 07:32:24.677008]: exmdb-audit: truncated message /var/lib/gromox/user/domain.tld/Username:f8585217:m8585866 (rewrite)
[2026-06-02 07:32:24.684232]: exmdb-audit: truncated message /var/lib/gromox/user/domain.tld/Username:f8585217:m8585932 (rewrite)
[2026-06-02 07:32:24.691360]: exmdb-audit: truncated message /var/lib/gromox/user/domain.tld/Username:f8585217:m8585920 (rewrite)
[2026-06-02 07:32:24.698846]: exmdb-audit: truncated message /var/lib/gromox/user/domain.tld/Username:f8585217:m8585844 (rewrite)
[2026-06-02 07:32:24.706187]: exmdb-audit: truncated message /var/lib/gromox/user/domain.tld/Username:f8585217:m8585876 (rewrite)
[2026-06-02 07:32:24.713445]: exmdb-audit: truncated message /var/lib/gromox/user/domain.tld/Username:f8585217:m8585764 (rewrite)
All User accounts and shared mailboxes have similar messages