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Exchange 2010 Error: Unable to mount database


exchange2010Q. My Exchange server crashed and I'm trying to mount the database, with no luck.

This is the error that I get:


Microsoft Exchange Error
Failed to mount database 'Mailbox Database'.
Mailbox Database 0610509261
Couldn't mount the database that you specified. Specified database: Mailbox Database; Error code: An Active Manager operation failed. Error: The database action failed. Error: Operation failed with message: MapiExceptionCallFailed: Unable to mount database. (hr=0x80004005, ec=-515)
. [Database: Mailbox Database, Server: server.domain.local].

An Active Manager operation failed. Error: The database action failed. Error: Operation failed with message: MapiExceptionCallFailed: Unable to mount database. (hr=0x80004005, ec=-515)
. [Database: Mailbox Database, Server: server.domain.local]

An Active Manager operation failed. Error: Operation failed with message: MapiExceptionCallFailed:
. [Server: server.domain.local]

MapiExceptionCallFailed: Unable to mount database. (hr=0x80004005, ec=-515)

A. You have a corrupted database or corrupted logs. Several tests need to be performed, to see what the issue is (this is an example for Exchange 2010, but it works for previous versions as well):

Check and Repair the database

1. Check the database:

eseutil /mh "C:\Program Files\Microsoft\Exchange Server\V14\Mailbox\Mailbox Database\Mailbox Database.edb"

Look for the following in the output: State: Dirty Shutdown

1.a Since the database has not been properly shut down, it needs to be repaired.

Make sure you make a backup of the database before attemting any kind of repairs

To repair, run the following:

eseutil /p "C:\Program Files\Microsoft\Exchange Server\V14\Mailbox\Mailbox Database\Mailbox Database.edb"

1.b Re-run the database check from 1.a and if all goes well, you should see this somewhere in the output: State: Clean Shutdown


You can try mounting the database. If it mounts, you are good to go, if it doesn't you have to check the logs:

Check and Repair the database logs

2. Check the exchange logs (don't forget to specify E00 - the starting sequence for the logs)

eseutil /ml "C:\Program Files\Microsoft\Exchange Server\V14\Mailbox\Mailbox Database\E00"

2.a There will be a list of logs and depending on their state, you may get an error. (They should all say OK, if the logs are clean) Errors vary, but most likely it is a file corruption and needs a chkdsk to run.

As a sidenote, if the database state is Clean Shutdown you can safely remove the logs.


Comments (27)
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27 Friday, 30 October 2020 04:56
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soluation- Unable to mount database\option mount and dismount not sjoing in action list
25 Saturday, 27 May 2017 00:49
Right-click Microsoft Exchange Information Store service, and then click Properties.
On the General tab of the Microsoft Exchange Information Store property page, make sure that the Start-up type is set to Automatic. If it is not, set it to Automatic, click Apply, and then click OK.
Right-click Microsoft Exchange Information Store service, and then click Start.
not able to mount database
24 Saturday, 18 February 2017 13:33
Couldn't mount the database that you specified. Specified database: EPCC-Standard-DB04; Error code: An Active Manager o
peration failed. Error The database action failed. Error: Operation failed with message: MapiExceptionCallFailed: Unabl
e to mount database. (hr=0x80004005, ec=-550)
. [Database: EPCC-Standard-DB04, Server:].
+ CategoryInfo : InvalidOperation: (EPCC-Standard-DB04:ADObjectId) [Mount-Database], InvalidOperationExce
+ FullyQualifiedErrorId : 8C91930,Microsoft.Exchange.Management.SystemConfigurationTasks.MountDatabase
Exchange Server recovery
23 Friday, 06 November 2015 05:51
Exchange Server recovery software is one such best tool that effectively repairs corrupt EDB files and recovers entire email data along with all email items such as email attachments, contacts, notes, calendar, tasks, deleted items etc. Read more :-
Exchnage Database Recovery
22 Friday, 30 October 2015 07:20
I would like to refer more effective exchange database recovery software, you can download RecoveryFix for Exchange Server Recovery Tool. This software recover emails, attachments, contacts, calendars, tasks, etc. from corrupt EDB files. It can supported MS Exchange Server 2013 / 2010 / 2007 / 2003 / 2000. Click here -
Re: MapiExceptionCallFailed: Unable to mount database. (hr=0x80004005, ec=-515)
21 Tuesday, 13 October 2015 20:40
Larry Kramer
We had also encountered similar problem in our Exchange 2010 mailbox store and the reason was corruption. We ran ESEUTIL /p tool to fix it but no luck. Then, one of MVPs suggested to go with a third party tool as the database was severely damaged. He shared a link with us to download and try it from the web:

I was surprised to see the output of this third party application as after few minutes, it displayed all data in their original format. And we successfully repaired and mounted all data with the help of this tool without any data loss.
Mailbox Exchange Recovery
20 Tuesday, 06 October 2015 11:34
Mailbox Exchange Recovery is a user-friendly tool to help you fix a corrupt or damaged EDB file. The software repairs damaged Exchange databases and extracts data of all user mailboxes within the file easily. Read more and free download click here
19 Friday, 22 May 2015 07:59
InFixi EDB to PST tool brilliantly works on damage exchange EDB file to quickly Export EDB file to PST file format, it’s my personal experience. This EDB Recovery Software simply resolve EDB file problems after then save EDB data into fresh PST file.

Read More:-
Recover your unmounted Exchange 2010 Database
18 Thursday, 21 May 2015 00:40
If your Exchange 2010 is unable to mount due to any error then use PDS Exchange 2010 EDB to PST software to fix errors and recover data from unmounted Exchange 2010 EDB file. It will makes entire data of Exchange 2010 readable again within just few seconds.

Read More
Resolve exchange server issue
17 Monday, 13 April 2015 05:27
Exchange Recovery software provides complete for exchange server users, the software can instantly repair corrupt edb files and fix Jet engine error, Virus attack, Header corrupted, Software & hardware disputes, Synchronizing error, Malfunctioning error, Log file error etc. For more help visit
Unable to mount database
16 Wednesday, 28 January 2015 00:48
Exchange server recovery software is an high quality tool that easily restore data from crashed exchage server and repair corrupt edb files. Convert you edb to outlook pst files by help of this tool. For more help visit or
You the Man!!
15 Tuesday, 20 January 2015 13:20
You the Man!!, Thanks
Public Database could not mounted,
14 Sunday, 11 January 2015 16:34
I have the problem that the public folder database could not be mounted.
Public Folder Database
An Active Manager operation failed.
Message: ... MapiExceptionJetErrorTableDuplicate: Unable to mount database. (hr=0x80004005, ec=-1303)
.. [Database: Public Folder Database, Server:].

I did:
eseutil /P
eseutil /d
eseutil /g
eseutil /mh (clean shutdown displayed)

But no success.
Could anybody help or has anybody a hint?
Kai from germany
13 Sunday, 21 December 2014 10:32
hello first of all thank you for this,

I was doing a vmdk shrinking in vmware datastore as my previouse colleagues used C: drive as a thick provisioned.

I moved mailboxes DB,PF DB to another drive and and separated transaction logs too . taken a full backup but I forgot to add the newely created PF_DB drive to it.

after full backup I shrinked the vmdk file and it worked fine when i used the third party tool to shrink the C: drive it screwed the OS :P hahahaha.

so restored bakup within night it came back online mailboxes didnt had issue. PF was down

I restored the PF database from day before backup and ran this glorious command it fixed :) :)

but after I received a clean shutdown also it was saying =-1209 error which means traansactions logs was not found. but waited 15 minuets. test again mounting it worked :)

thank you so much , I know this pain working as a senior network engineer for consultancy and my client was financial MGMT company.

thank you again have a nice day
it fixed up the problem!
12 Monday, 10 June 2013 23:05
thank you very much!
exchange 2013 unable to mount database
11 Tuesday, 07 May 2013 15:38
I had an error mounting a database after moving the database path,with the error "mount databse failed".

i did What justin wrote...
move-DatabasePath -Identity 'database name' -LogFolderPath 'new log path' -ConfigurationOnly

it will move log configuration ,then run ESEUTIL /p to recover the database

Worked Perfectly!!!

Thank you Justin
10 Saturday, 23 February 2013 22:09
it fixed up the problemmmmmmmmm
thank u
Re: Unable to mount database
9 Friday, 18 January 2013 22:27
Jim Rane
Thanks for placing the solution here. I fixed such error and restored my damaged Exchange server successfully with the help of this advance tool:

it worked!!!
8 Wednesday, 09 January 2013 04:19
Thanks for this post, it works like a charm. I've checked the database and it was "ok", than I stopped the services and deleted the logfiles. Than I started the services again and mounted the database. :)
Still having errors
7 Thursday, 03 January 2013 05:34
Tareq Khalaf
I did the steps before. The database is in clean shutdown. I ran the chckdsk with no errors. However, the problem still exist. I can't mount the database!
Re: Exchange 2010 Error: Unable to mount database
6 Thursday, 13 December 2012 03:59

You got an error when you were trying to mount your exchange database using above methods. I would suggest you to try another automatic method which has simple steps to repair your mailbox and recover email information from Exchange server i.e. Stellar Phoenix Exchange Sever Recovery. The software helps you to repair your corresponding EDB file mailbox and recover all lost email from exchange server.
cannot mount database
5 Friday, 23 November 2012 01:08
Hi all,

After move path log for Mailbox database and Public Folder Database --> success.

And then, I try to mount database for them by EMC, but I show errors as this entry above. I also follow as the instruction, but I cannot mount database.

So, what would I need to do for solving this issue ?
Check recovery database is mounted or not
4 Wednesday, 21 November 2012 01:52
sumit naik
using exchange 2010 cmdlet,how to check recovery database is mounted state or not

mail me at :
Re: MS Exchange 2010
3 Thursday, 13 September 2012 04:02
i had a same problem like that my log path drive is corrupted.i try to move log to another drive but its corrupted so i run the folowwing command in EMC
move-DatabasePath -Identity 'database name' -LogFolderPath 'new log path' -ConfigurationOnly

it will move log configuration ,then run ESEUTIL /p to recover the database

after finish i tried to mount the database and its working

Download free softwares
Latest Technical Blog
Unable to mount database
2 Wednesday, 29 August 2012 03:37
Brian Lenin
Running eseutil /p (hard repair) method may sometimes leads to serious data loss issues in the database. So, it is highly advised to keep a copy of databases before running these command line tools. If log files are missing and database files are severely damaged, it is good to use most recent backup file or a third party tool like Stellar Phoenix Exchange Server Recovery:

1 Thursday, 22 December 2011 08:23
Thank you - it worked after I did a repair on the database. Logs were fine.

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