Sync Blocked senders list (max 100)

[cyber7]

Hi Guys 'n Girls

I have a problem with my Outlook Sync.

It comes up with a sync error and a message:
Maximum number of Blocked Senders exceeded (max is 100)
How do I increase this?

Kind regards
Aubrey Kloppers

ps1: - I have found the GA value (zimbraMailBlacklistMaxNumEntries) of 100, but where do I increase this for all the mail users?

ps2: - even further on this - doing a:
zmprov md <domain> zimbraMailBlacklistMaxNumEntries 1000
gives me:
ERROR: service.INVALID_REQUEST (invalid request: LDAP schema violation: [LDAP: error code 65 - attribute 'zimbraMailBlacklistMaxNumEntries' not allowed])

[Krishopper]

You can change that at the account level, or the COS level.

zmprov ma user@domain.com zimbraMailBlacklistMaxNumEntries 1000
-or-
zmprov mc cosname zimbraMailBlacklistMaxNumEntries 1000