Unable to send as mailbox

Hi,

I'm currently unable to send as a mailbox and it is just showing an error that I'm unable to send on behalf of the specified user.  However, I have granted myself send as permission in Exchange.  I have already recreated my profile and tried a different computer.

This account was previously a domain admin and the problem started about the time it was removed from being a domain admin but it may have fixed itself for a while (I'm not 100% sure about this though).

Has anyone got any ideas about what might fix it?

- Matthew.
stvmphAsked:
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Will SzymkowskiSenior Solution ArchitectCommented:
Open ADUC and find the user account. Open the properties and Security>Advanced Security check to make sure that you actually have Send As permissions on the active directory object itself. If your replication is not working or is delayed it might not have updated the Send As permissions yet.

Send As permissions are Active Directory specific. Send on Behalf of is Exchange specific.

Will.
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stvmphAuthor Commented:
I have the Send As permissions there too.  I should point out it is working fine for other users as well.
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Will SzymkowskiSenior Solution ArchitectCommented:
If you use Outlook in online mode does this work? Have you also tried outlook in safemode?

Will.
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stvmphAuthor Commented:
Neither mode has had any effect unfortunately.

- Matthew.
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Will SzymkowskiSenior Solution ArchitectCommented:
Is your active directory replicaiton working as exprected?

Repadmin /replsum
Repadmin /showrepl
Repadmin /bridgeheads
DCDiag /V

Will.
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Chris BrittanDirectorCommented:
Have you tried again since? I've found that send as permissions often take a couple of hours as it needs AD replication to make the change active
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stvmphAuthor Commented:
Ok guys, I'm thinking you're off track with replication.  This has been ongoing for a long time, I've just learnt to deal with it (like 2 years at least, not hours).  We have had plenty of other people had their send as permission set fine etc since then.  I have also had it working but for some reason it stopped working a while ago (about the time I had domain admin privileges removed from that account).

- Matthew.
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Chris BrittanDirectorCommented:
If you go to Active Directory, then Enable Advanced features (View/Advanced features)

Go to the properties of the user you want to be sent on behalf of, go to the security tab, find the user that you are wanting to be able to send and see if the 'Send As' box is ticked.

(Not sure where I'm going with this, but just curious to see if the change presumably made in exchange is coming through to AD)
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stvmphAuthor Commented:
Thanks Chris but Will already suggested that and it was correct.

Also, I've attached the output of those commands Will, not sure what I'm looking for but they all seem satisfactory to me.
bridgeheads.txt
dcdiag.txt
showrepl.txt
replsum.txt
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Satya PathakLead Technical ConsultantCommented:
Did you try to send an emails through OWA ? If yes kindly share error  message for further check.
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stvmphAuthor Commented:
Because of our set up, the mailboxes are on different exchange servers so basically it just shows an error that it's not accessible at all.  However, this isn't a problem as others have the same setup and it works fine for them and I can see the mailbox inside my Outlook fine, just can't send as from it (which has been a problem since both mailboxes were on the same server).

I've also attached a screenshot of the exact error.  Basically it appears to be trying to "Send on behalf" instead of "Send as" and it's failing.
outlook-error.png
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stvmphAuthor Commented:
Does anyone have any other suggests or information for this one that I could try?
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Will SzymkowskiSenior Solution ArchitectCommented:
Have you tried Outlook in Online mode rather than cached mode? Also have you been able to restart the Information Store Service on your Exchange servers?

Will.
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stvmphAuthor Commented:
Oh, I didn't see your reponse.  Yes I have tried online mode rather than cached mode with no luck.  Also, the entire server has been restarted on a few occasions since I started having this problem.
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stvmphAuthor Commented:
Any other ideas?
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stvmphAuthor Commented:
Well, I finally found what it was.  Outlook has been caching details about the mailbox I was trying to send from.  Deleted the cache and then typed in the mailbox again and it started working again.

Something quite simple after all that.
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stvmphAuthor Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for stvmph's comment #a40862736

for the following reason:

No one else had provided a substantial answer and I fixed it fine myself.
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Will SzymkowskiSenior Solution ArchitectCommented:
Can you let us know what the solution was?

Will.
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stvmphAuthor Commented:
I did.  It's in the comment above.  "Outlook has been caching details about the mailbox I was trying to send from.  Deleted the cache and then typed in the mailbox again and it started working again."

Strangely it'd send fine to the mailbox, but not send from the mailbox.
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