CODEWITHSUNDEEP
delphioutlookdelphi-xe2
SiBrit
SiBrit

Reputation: 1542

Using CreateOleObject('Outlook.Application') causes "Server execution failed" error when run as administrator

It's a Delphi XE2 app. Pretty simple. Just calls CreateOleObject('Outlook.Application') and assigns the result to a Variant.

If the program is run as administrator it fails with "Server execution failed", but it works fine and I can get the version number back if I run as the logged in user (without elevated permissions).

Why is this? What is it about running as administrator that stops it from creating the object?

Upvotes: 0

Views: 4076

Answers (1)

Dmitry Streblechenko
Dmitry Streblechenko

Reputation: 66286

This error is due to a mismatch between the security contexts. Outlook is a singleton, so CreateOleObject will connect to the running instance of Outlook if it is available. COM system refuses to marshal calls between processes with different security contexts.

Either make sure Outlook is not running when calling CreateOleObject or make sure both processes run in the same security context.

You can also switch to Extended MAPI (which is a set of dlls loaded in-proc) used directly or through a wrapper (such as Redemption (I am its author) - its RDO family of objects roughly corresponds to the Namespace object in the Outlook Object Model.).

Upvotes: 8

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