Unable to retrieve Free/Busy information for some Office 365 mailboxes. Event ID: 4002; Source: MSExchange Availability;

Problem:

If you running Hybrid Environment or just trying to share free/busy information between your on-premise Exchange Organization and Office 365 you may experience that free/busy information for some mailboxes which were recently moved to O365 is not available. Please note that problem does not affect free/busy from on-premise to O365, if you cannot get free/busy for on-premise mailboxes – it must be another issue.

In addition you may see error similar to following in Application Event Log of your Hybrid server:

Event 4002, MSExchange Availability
Process 4192: ProxyWebRequest FederatedCrossForest from S-0-0-00
-0000000000-0000000000-000000000-0000 to https://server_name.outl
ook.com/EWS/Exchange.asmx/WSSecurity failed. Caller SIDs: WSSecur
ity. The exception returned is Microsoft.Exchange.InfoWorker.Comm
on.Availability.ProxyWebRequestProcessingException: System.Web.Se
rvices.Protocols.SoapException: An internal server error occurred
. The operation failed.

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How to get services.wsdl for Office 365?

In case you looking for downloading services.wsdl for Office 365 possible that you may find that is  not so straightforward.

In general services.wsdl usually located on URL:

https://server_name/ews/services.wsdl but

How to determine actual server for Office 365 mailbox?

On internet you may find such kind of solution:

— Login to your e-mail account using Outlook Web App (OWA).
— Click Options > See All Options > Account > My Account > Settings for POP, IMAP, and SMTP access.
— In the list of entries, locate the server name

In fact it is not exactly correct, because name you will see there is outlook.office365.com – which is global alias and does not pointing to actual server:
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Office 365: Cannot localize default folders

In Office 365 OWA it is possible to rename default folders like Inbox, Sent, Deleted, etc. to match specified language.

Sometimes you may receive following error message:

“The localization operation of the default folders of mailbox “someserver.prod.outlook.com/Microsoft Exchange Hosted Organizations/yourtenant.name/username” failed:Cannot localize the default folders.”

That message does not contain any explanations about possible reasons of that error.

O3651

 

One of the reason that can cause such error is that folder with such name is already exists. Sometimes users exporting their old folders into Office 365 and these folders have same names as default folders.

How it works:
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Re-connection of Exchange 2007 Mailbox

Sometimes during migration of Mailboxes – especially in cross-forest migrations, some of mailboxes may become corrupted. Mailboxes can fail test Test-MapiConnectiviy, user maybe unable to login into mailbox using OWA or messages just not coming in and not going out.

General solution here is disconnect and then connect mailbox again. You only should keep in mind that when you disconnecting Mailbox all Email addresses will be deleted so there is need to note all of them before disconnection.

Following script will do the work:
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