• RSS
  • Twitter
  • FaceBook

Exchange Server Forums

Forums | Register | Login | My Profile | Inbox | RSS RSS icon | My Subscription | My Forums | Address Book | Member List | Search | FAQ | Ticket List | Log Out

Exchange 2010 High Availability of Public Folders?

Users viewing this topic: none

Logged in as: Guest
  Printable Version
All Forums >> [Microsoft Exchange 2010] >> High Availability >> Exchange 2010 High Availability of Public Folders? Page: [1]
Login
Message << Older Topic   Newer Topic >>
Exchange 2010 High Availability of Public Folders? - 3.May2010 6:41:37 PM   
skreel

 

Posts: 4
Joined: 3.May2010
Status: offline
In exchange 2010 to achieve data redundancy of public folders you configure multiple public folder databases across servers and configure public folder replication. How then does one make this highly available to outlook clients?

Outlook clients connect directly to the mailbox server for public folder access and do not go through the CAS or CAS array. So no HA/redundancy there.

In previous versions of exchange 2003/2007, public folder HA was available since the clustering happened at the server level. Now that DAGs are required and clustering happens at the database level this isn't so available since DAGs don't support public folder databases.

It is my understanding that the client has one default public folder database associated to it. This is set on the mailbox database (Exchange Management Console->Organization Configureation->Mailbox->Properties on Mailbox->Client Settings Tab->Default public folder database). When the server that hosts that public folder database goes offline for routine maintenance or an unscheduled outage, all public folder access is lost. How can one keep public folders up and accessible without having to manually switch the "Default Public Folder Database" on the mailbox database? I thought referrals might work, but that doesn't seem to work since the clients main PF server is down.

Is maintaining a legacy 2003 or 2007 exchange box the only option to have public folders highly available?
Post #: 1
RE: Exchange 2010 High Availability of Public Folders? - 4.May2010 4:08:30 AM   
ismail.mohammed

 

Posts: 3018
Joined: 9.May2007
From: India
Status: offline
may be this can help you mate

A public folder database can be hosted on a mailbox server which is a member of a DAG, but you must configure multiple public folder databases across servers and configure public folder replication for data redundancy.

http://www.howexchangeworks.com/2010/02/exchange-2010-public-folders-are-not.html

(in reply to skreel)
Post #: 2
RE: Exchange 2010 High Availability of Public Folders? - 4.May2010 11:12:36 AM   
skreel

 

Posts: 4
Joined: 3.May2010
Status: offline
quote:

ORIGINAL: ismail.mohammed

may be this can help you mate

A public folder database can be hosted on a mailbox server which is a member of a DAG, but you must configure multiple public folder databases across servers and configure public folder replication for data redundancy.

http://www.howexchangeworks.com/2010/02/exchange-2010-public-folders-are-not.html


This provides data redundancy, but from my understanding it does not provide high availability in that the public folder store can be up 24x7. Unless I'm missing something, the outlook clients will only and can only connect to one of the two public folder databases. Thus in the event of the public folder database becoming offline there is no way to automatically fail over to the second database. I'm by no means an exchange expert, so I may be missing something simple here?

(in reply to ismail.mohammed)
Post #: 3
RE: Exchange 2010 High Availability of Public Folders? - 5.May2010 12:53:58 AM   
ismail.mohammed

 

Posts: 3018
Joined: 9.May2007
From: India
Status: offline
When a user accesses a public folder by using a MAPI client application, such as Microsoft Outlook, the public folder database determines which public folder replica the client should access. This process is called referral. If a replica of the requested content exists on the server running Microsoft Exchange that serves the client request, the client accesses the local replica. When a user connects to a public folder database that doesn't contain a copy of the public folder content that the user wants, the user is redirected to another public folder database that has a copy of the content.

http://technet.microsoft.com/en-us/library/bb691235.aspx

(in reply to skreel)
Post #: 4
RE: Exchange 2010 High Availability of Public Folders? - 5.May2010 7:45:24 AM   
skreel

 

Posts: 4
Joined: 3.May2010
Status: offline
quote:

ORIGINAL: ismail.mohammed

When a user accesses a public folder by using a MAPI client application, such as Microsoft Outlook, the public folder database determines which public folder replica the client should access. This process is called referral. If a replica of the requested content exists on the server running Microsoft Exchange that serves the client request, the client accesses the local replica. When a user connects to a public folder database that doesn't contain a copy of the public folder content that the user wants, the user is redirected to another public folder database that has a copy of the content.

http://technet.microsoft.com/en-us/library/bb691235.aspx


Yeah, one would think that would work. Unfortunately it doesn't. The problem is the client's public database is down. Thus the client can't get referred to another database.

(in reply to ismail.mohammed)
Post #: 5
RE: Exchange 2010 High Availability of Public Folders? - 5.May2010 7:50:38 AM   
ismail.mohammed

 

Posts: 3018
Joined: 9.May2007
From: India
Status: offline
any error message on the client end and event logs on the exchange server database related to PF

(in reply to skreel)
Post #: 6
RE: Exchange 2010 High Availability of Public Folders? - 5.May2010 11:44:42 AM   
skreel

 

Posts: 4
Joined: 3.May2010
Status: offline
There are no errors in the client's event logs. When I try to access the public folders from the outlook 2007 like it hangs for a bit and then a dialog box comes back and says:

"Cannot expand the folder. Microsoft Exchange is not available. Either there are network problems or the Exchange computer is down for maintenance. (/o=First Organization/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/CD=Configuration/cn=Server/cn=EX01)

Email sends and receives fine, as that's connecting through our CAS array. PF are trying to connect directly to the mailbox server though and that particular mailbox server is offline.

OWA can get to the public folders.

Here are all the error messages related to public folders. I don't think they explain much though. My test domain is idiago.com and my test servers are ex01 and ex02.

ERROR:
- System

- Provider

[ Name] MSExchangeRepl

- EventID 3154

[ Qualifiers] 49156

Level 2

Task 1

Keywords 0x80000000000000

- TimeCreated

[ SystemTime] 2010-05-05T15:05:07.000000000Z

EventRecordID 2418

Channel Application

Computer ex02.idiago.com

Security


- EventData

PF01
EX01.idiago.com
An Active Manager operation failed. Error: The database action failed. Error: An error occurred while trying to select a database copy for possible activation. Error: The database 'PF01' was not mounted because errors occurred either while validating database copies for possible activation, or while attempting to activate another copy. Detailed error(s): ex01: Server 'EX01.idiago.com' is not up according to the Windows Failover Cluster service.


ERROR:
- System

- Provider

[ Name] MSExchangeRepl

- EventID 4098

[ Qualifiers] 49156

Level 2

Task 5

Keywords 0x80000000000000

- TimeCreated

[ SystemTime] 2010-05-05T15:05:07.000000000Z

EventRecordID 2419

Channel Application

Computer ex02.idiago.com

Security


- EventData

0b70d78f-56a1-4164-ac47-8883a2d5bec0
EX02
The Microsoft Exchange Replication service couldn't find a valid configuration for database '0b70d78f-56a1-4164-ac47-8883a2d5bec0' on server 'EX02'. Error:


WARNING:
- System

- Provider

[ Name] MSExchange Mailbox Replication

- EventID 1007

[ Qualifiers] 32772

Level 3

Task 1

Keywords 0x80000000000000

- TimeCreated

[ SystemTime] 2010-05-05T15:09:03.000000000Z

EventRecordID 2448

Channel Application

Computer ex02.idiago.com

Security


- EventData

EX01.idiago.com
MapiExceptionNetworkError: Unable to make admin interface connection to server. (hr=0x80040115, ec=-2147221227) Diagnostic context: ...... Lid: 15000 dwParam: 0x6BA Msg: EEInfo: prm[1]: Pointer val: 0x0000000000000000 Lid: 15000 dwParam: 0x6BA Msg: EEInfo: prm[2]: Pointer val: 0xC3E7A8C000000000 Lid: 16280 dwParam: 0x6BA Msg: EEInfo: ComputerName: n/a Lid: 8600 dwParam: 0x6BA Msg: EEInfo: ProcessID: 2096 Lid: 12696 dwParam: 0x6BA Msg: EEInfo: Generation Time: 2010-05-05 15:09:03:235 Lid: 10648 dwParam: 0x6BA Msg: EEInfo: Generating component: 18 Lid: 14744 dwParam: 0x6BA Msg: EEInfo: Status: 10060 Lid: 9624 dwParam: 0x6BA Msg: EEInfo: Detection location: 318 Lid: 13720 dwParam: 0x6BA Msg: EEInfo: Flags: 0 Lid: 11672 dwParam: 0x6BA Msg: EEInfo: NumberOfParameters: 0 Lid: 24060 StoreEc: 0x80040115 Lid: 23746 Lid: 31938 StoreEc: 0x80040115 Lid: 19650 Lid: 27842 StoreEc: 0x80040115 Lid: 20866 Lid: 29058 StoreEc: 0x80040115

(in reply to ismail.mohammed)
Post #: 7

Page:   [1] << Older Topic    Newer Topic >>
All Forums >> [Microsoft Exchange 2010] >> High Availability >> Exchange 2010 High Availability of Public Folders? Page: [1]
Jump to:

New Messages No New Messages
Hot Topic w/ New Messages Hot Topic w/o New Messages
Locked w/ New Messages Locked w/o New Messages
 Post New Thread
 Reply to Message
 Post New Poll
 Submit Vote
 Delete My Own Post
 Delete My Own Thread
 Rate Posts


Follow TechGenix on Twitter