Did this require any more adjustment on your part? Because is in my case implemented as standard as follow
SYNC_PROVISION_MAXATTSIZE => [
self::STREAMER_VAR => "maxattsize",
self::STREAMER_PROP => self::STREAMER_TYPE_SEND_EMPTY,
self::STREAMER_CHECKS => [self::STREAMER_CHECK_CMPHIGHER => -1],
The maybe difference is " ]," at the end. Which versions you are using. I use
localhost:~ # rpm -qa 'grom*'
grommunio-cui-1.0.241.dbe4906-lp154.45.1.noarch
grommunio-index-0.1.25.3e826c9-lp154.31.1.x86_64
gromox-debugsource-2.2.140.7f3e6a0-lp154.112.1.x86_64
grommunio-admin-api-1.9.28.774374b-lp154.46.1.noarch
grommunio-sync-1.1.62-lp154.75.1.noarch
grommunio-web-3.1.197.c7957cc-lp154.157.1.noarch
grommunio-dbconf-1.1.1.da20a46-lp154.4.2.x86_64
grommunio-common-10.e94d08a-lp154.7.1.x86_64
grommunio-setup-1.0.68.bb1014d-lp154.7.1.noarch
grommunio-release-2022.12.1-lp154.3.1.x86_64
gromox-2.2.140.7f3e6a0-lp154.112.1.x86_64
grommunio-imapsync-2.178-lp154.1.1.noarch
grommunio-admin-common-6.cb985db-lp154.3.1.noarch
grommunio-antispam-3.4-lp154.2.1.x86_64
grommunio-admin-web-2.6.0.43.2feaeef-lp154.35.1.noarch
grommunio-dav-1.1.37.d5b6463-lp154.9.1.noarch
gromox-debuginfo-2.2.140.7f3e6a0-lp154.112.1.x86_64
grommunio-error-pages-1.0.6.9c50afb-lp154.3.1.noarch
localhost:~ #
It would be incredible if something like this were to change through updates, since in my case above versions are running.