Software voor sex chat - Updating recipient policies for hybrid coexistence

The used SMTP domain “contoso.local” is taken from the GAL object unless the lookup failed; in that case the forest DN is used.

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While using the legacy Exchange DN makes your client insensitive to e-mail address changes, name changes etc.

it will provide a (small) challenge when for example a mailbox is moved to a different forest (or to or from Office 365 for that matter) as it will get a new legacy Exchange DN value.

After some recent Exchange troubleshooting I decided to do a small write-up on an attribute most people working with Exchange know about, the infamous exchange Legacy DN.

History In the early days of Exchange, the NT world was flat.

When public folders are used for publishing Free/Busy information, the legacy Exchange DN was used to determine in which public folder the information was published. Typical values for the legacy Exchange DN attribute are: Until Exchange 2010 SP1 Rollup 6 the legacy Exchange DN value was predictable, but as of this Rollup (and Exchange 2013), 3 random hex characters are added for uniqueness.

Exchange Internal Addressing While SMTP addressing is the de facto e-mail addressing standard, Exchange internally still uses an X.500 addressing scheme.

It will also store the legacy Exchange DN (PR_EMAIL_ADDRESS) with e-mail item.

This is used when replying to old e-mail and which is why you’ll see X.500 addresses when you open the e-mail outside of the organization.

I’ll mention it again: legacy Exchange DN is required, unlike some Exchange admins I overheard a while ago when they were looking for the cause of several NDRs discussing SMTP was used so it should be ‘no problem’.

IMCEA and IMCEAEX When sending a message, the sender and recipient are checked against the Global Address List (GAL).

Scott Burrell covers Office 365 hybrid configuration, Exchange federation, and coexistence with earlier versions of Exchange.

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