Exchange processing wizard Error -2147217730 Could not process folder permissions in mailboxes (4259787)

Exchange Processing Wizard works for most server, but for one or a few of them an error is given Error    -2147217730    Could not process folder permissions in mailboxes (server 'MAILSRV01'). Object variable or With block variable not set

Debug log files contain messages similar to the following:

3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:CWorker.GetExchangeAdapterByServerName    TraceMsg    0    Initializing connection to Exchange Web Services (user 'company\qmmssvc', server 'MAILSRV01').
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:CWorker.ProcessPublicFolders    Error    -2147217732    Could not process permissions on public folder 'Public Root' (server 'MAILSRV01'). [QsExchange2010Connector] There are no public folder servers available.
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:CWorker.CollectMailboxes    TraceMsg    0    Begin function
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:MLdap.GetGCLdap    TraceMsg    0    Begin function
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:MLdap.GetGCLdap    Informational    0    Autodect GC to 'gc.company.com:3268'
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:MLdap.InitLDAP    TraceMsg    0    Begin function
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:MLdap.InitLDAP    Informational    0    Initializing LDAP connection to server 'gc.company.com' (port 3268).
3/9/2016 1:08:16 PM(GMT+01:00)    (null)    (null)    Informational    0    The call completed successfully (LDAP_SUCCESS). LDAP session established successfully (HostName 'gc.company.com', ldap_open).
3/9/2016 1:08:16 PM(GMT+01:00)    (null)    (null)    Informational    0     User 'qmmssvc', domain 'company' successfully authenticated to the LDAP server. Dn: '(null)'. (ldap_bind_s).
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:MLdap.InitLDAP    TraceMsg    0    End function
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:MLdap.GetGCLdap    TraceMsg    0    End function
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:MLdap.GetLdapSearch    TraceMsg    0    Search.Base:=
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:MLdap.GetLdapSearch    TraceMsg    0          .Scope:= LDAP_SCOPE_SUBTREE; .LdapSearchTimeout:= -1
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:MLdap.GetLdapSearch    TraceMsg    0          .Filter:= (&(mailNickName=*)(msExchHomeServerName=\2Fo\3DOrg\2Fou\3Dexchange\20administrative\20group\20\28fydibohf23spdlt\29\2Fcn\3Dconfiguration\2Fcn\3Dservers\2Fcn\3DMAILSRV01)(objectCategory=person)(objectClass=user)(!(msExchRecipientTypeDetails=68719476736)))
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:MLdap.GetLdapSearch    TraceMsg    0          .Attributes:= proxyAddresses, homeMDB
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]:CWorker.ProcessMailboxes    Error    -2147217730    Could not process folder permissions in mailboxes (server 'MAILSRV01'). Object variable or With block variable not set
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]    Summary    0    Server 'MAILSRV01'. Processing results: Scanned: 0, Skipped because no local replica was found: 0, Skipped because another replica was already processed: 0, Failed: 2.
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]    Summary    0    Server 'MAILSRV01'. Client permissions processing results: Modified: 0, Not modified: 0, Failed: 0.
3/9/2016 1:08:16 PM(GMT+01:00)    (3536)    [E2KTPU]    Summary    0    Server 'MAILSRV01'. Administrative rights processing results: Modified: 0, Not modified: 0, Failed: 0.
3/9/2016 1:08:16 PM(GMT+01:00)            Informational    0    Exchange Processing Wizard has finished the Exchange servers re-permissioning.