I am having serious issue during coexistence between exchange 2010 and 2013, authentication failed when attempting to connect through IMAP, I will write the environment and the logs in points so that the description of the issue will be clear for everyone.
- The environment has 2 exchange 2013 servers CU10 SP1, each server has combined (CAS+MBX) installed, and coexist with legacy exchange servers (exchange 2010)
- Exchange 2013 servers installed on windows 2012 servers
- No firewall between exchange servers and clients
- Exchange 2010 mailboxes can connect to their mailboxes through IMAP just fine without any issue
- Exchange 2013 mailboxes cannot connect through IMAP (NO LOGON failed)
- Mailboxes needs to connect to port 143 (not 993)
- IMAP4 and IMAP4BE services are running in both exchange 2013 servers
- Get-servercomponentstate shows that ImapProxy is active
Get-healthreport shows that IMAP is in Unhealthy state (the reason is NO LOGIN failed)
telnet <exchange_server> 143
The Microsoft Exchange IMAP4 service is ready.
? login <user> <password>
NO LOGIN failedThe output of the command (get-imapsettings) is as follow:
RunspaceId : a63b58c4-7fa3-42cb-a270-cdcf91032853
ProtocolName : IMAP4
Name : 1
MaxCommandSize : 10240
ShowHiddenFoldersEnabled : False
UnencryptedOrTLSBindings : {[::]:143, 0.0.0.0:143}
SSLBindings : {0.0.0.0:993, [::]:993}
InternalConnectionSettings : {SHUEXCH02.mydomain.com:993:SSL, SHUEXCH02.mydomain.com:143:TLS}
ExternalConnectionSettings : {}
X509CertificateName : shuexch02
Banner : The Microsoft Exchange IMAP4 service is ready.
LoginType : PlainTextLogin
AuthenticatedConnectionTimeout : 00:30:00
PreAuthenticatedConnectionTimeout : 00:01:00
MaxConnections : 2147483647
MaxConnectionFromSingleIP : 2147483647
MaxConnectionsPerUser : 16
MessageRetrievalMimeFormat : BestBodyFormat
ProxyTargetPort : 143
CalendarItemRetrievalOption : iCalendar
OwaServerUrl :
EnableExactRFC822Size : False
LiveIdBasicAuthReplacement : False
SuppressReadReceipt : False
ProtocolLogEnabled : True
EnforceCertificateErrors : False
LogFileLocation : C:\Program Files\Microsoft\Exchange Server\V15\Logging\Imap4
LogFileRollOverSettings : Daily
LogPerFileSizeQuota : 0 B (0 bytes)
ExtendedProtectionPolicy : None
EnableGSSAPIAndNTLMAuth : False
Server : SHUEXCH02
AdminDisplayName :
ExchangeVersion : 0.10 (14.0.100.0)
DistinguishedName : CN=1,CN=IMAP4,CN=Protocols,CN=SHUEXCH02,CN=Servers,CN=Exchange Administrative
Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=domain,CN=Microsoft
Exchange,CN=Services,CN=Configuration,DC=mydomain,DC=com, Identity : SHUEXCH02\1
Guid : d72d0ee4-0711-4769-9174-bb7f76f25316
ObjectCategory : mydomain.com
/Configuration/Schema/ms-Exch-Protocol-Cfg-IMAP-Server
ObjectClass : {top, protocolCfg, protocolCfgIMAP, protocolCfgIMAPServer}
WhenChanged : 2/28/2016 11:20:42 AM
WhenCreated : 10/26/2015 3:20:34 PM
WhenChangedUTC : 2/28/2016 8:20:42 AM
WhenCreatedUTC : 10/26/2015 12:20:34 PM
OrganizationId :
Id : SHUEXCH02\1
OriginatingServer : SHUDC01.mydomain.com
IsValid : True
ObjectState : Unchanged
- IMAP Logs show that :
16-02-**29T00:02:43.161Z,00000000000007AD,2,127.0.0.1:993,127.0.0.1:14599,HealthMailbox7a89f888474b4e78a0e67922c9f73846,43,72,87,login,HealthMailbox7a89f888474b4e78a0e67922c9f73846@mydomain.com *****,"R=""z NO [Error=ProxyNotAuthenticated Proxy=SHUEXCH01.mydomain.com:143:SSL] LOGIN failed."";Msg=Proxy:SHUEXCH01.mydomain.com:143:SSL;ErrMsg=ProxyNotAuthenticated" 2016-02-**29T00:02:43.161Z,00000000000007AD,3,127.0.0.1:993,127.0.0.1:14599,HealthMailbox7a89f888474b4e78a0e67922c9f73846,0,0,0,CloseSession,,
Hope these information contains all the informations you need
Please anyone can help me solving this issue
