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Improving the reliability and stability of Entourage, the e-mail client in next week's update to Office for the Mac, was more important than making the program a clone of Windows' Outlook, several Microsoft developers said today.

That will disappoint users who have been pleading or demanding -- or both -- that Entourage connect to corporate Exchange mail servers with the same functionality as Outlook, the client included with the Windows' version of Office.

Microsoft Office 2008 for Mac is scheduled to launch on Tuesday.

"The real story with Entourage [2008] is that we have improved its reliability," said Andy Ruff, lead program manager for the e-mail client. "When we looked at Entourage two years ago, we felt that improving the reliability and stability was the way to go."

Users keeping tabs on the progress of Office 2008 last year, however, had different ideas about what they hoped to see in Entourage. In October, when the Office team blogged about improvements to the client's calendar, 135 users left comments. Many lobbied hard for better Exchange support and more interoperability between Outlook and Entourage.

"I just can't figure out why it's so hard to read .pst file [the data file format used by Outlook], and get full access to Exchange servers like Windows, in every manner," someone identified as Jason said in a comment left on the Oct. 15 post.

Another user was more colorful in his language. "Exchange support for notes and tasks is a must," said Evan Baxter. "If it's missing in January, I am going to be very pissed. I am sick and tired of all this half-assed Exchange support."

"Technically, that's a very difficult thing to do," Ruff said when asked why Entourage 2008 couldn't read Outlook's .pst files. Instead, the team devoted its time and resources to improving the reliability of Entourage's synchronization, both with Exchange and -- using the Mac OS X's own Sync Services -- with other applications such as iCal, the calendar bundled with every Mac.

"A[nother] big area of pain was the calendar," added Rich Kmieciak, an Entourage program manager. "We straightened lots of problems out [in the calendar] and added features. It was a big investment in this release."