If you're thrown an
Unknown MAPI Error: MAPI_E_NOT_FOUND when logging with a newly created account on Kopano, it is mostly because the user does not have a store. The kopano-server log doesn't help much to identify this neither does the webapp which only throws the MAPI error.
It is most likely to occur when using an external user database such as LDAP. The users database is synced successfully with LDAP, creating the new user but the store is not created and attached to the account.
In the case if the user was not synced the kopano-server log would have a proper message indicating that it failed to authenticate using the LDAP plugin.
Jan 25 18:26:35 kopano-1 kopano-server: Authentication by plugin failed for user "bajirao.singham": Trying to authenticate failed: Failure connecting any of the LDAP servers; username = bajirao.singham
If the user could not authenticate then the webapp would display a "logon failure" message while asking to verify credentials. It would not display the MAPI error.
Checking the user details with kopano-admin does however hint at the missing store.
$ kopano-admin --details bajirao.singham User object id: 00000000AC21A95040D3EE48B319FBA75330442501006001 WARNING: Unable to get user store entry id. User possibly has no store. User store id: Username: bajirao.singham Fullname: Bajirao Singham Emailaddress: firstname.lastname@example.org Active: yes Administrator: no Address book: Visible Auto-accept meeting req:no Mapped properties: 0x8C6D0102 48 bytes PR_GIVEN_NAME Bajirao PR_BUSINESS_TELEPHONE_NUMBER +2301234567 0x3A0C001E en_US PR_SURNAME Singham PR_TITLE Police Officer PR_MOBILE_TELEPHONE_NUMBER +23051234567 PR_LOCALITY Shivgarh PR_POSTAL_CODE 457001 PR_EC_ENABLED_FEATURES mobile; outlook; webapp PR_EC_DISABLED_FEATURES imap; pop3 Unable to show object quota information: missing or invalid argument (0x80070057) Groups (1): Police Force
Create a store using the kopano-admin tool.
$ kopano-admin --create-store bajirao.singham
The store will be created and hooked to the bajirao.singham user account in the above example. Login with the account should then be successful.