Microsoft on Tuesday released Office for Mac 2011 Service Pack 1, fixing a number of issues and improving security.

[ad#Google Adsense 300×250 in story]According to Microsoft, the update includes fixes for vulnerabilities that an attacker can use to overwrite the contents of your computer’s memory with malicious code.

As outlined when The Loop spoke with Microsoft last week, the biggest new features of SP1 come in Outlook.

The update will enable calendar syncing between Outlook for Mac and Apple’s Sync Services. This means you can now sync your Outlook calendars, as well as your contacts, notes and tasks with any service or device that supports Sync Services.

That includes your iPhone and iPad. Microsoft’s Senior Director of Product Management, Pat Fox, told The Loop that this was one of the most requested features from Office for Mac 2011 users.

Outlook for Mac 2011 SP1 also includes Outlook support for Exchange based server-side rules; Outlook Redirect button (you can redirect the message to the intended recipient and the replies will go to the original sender); Outlook Resend button; Outlook edit of existing messages; and Solver integration support in Excel.

The update is available from Microsoft’s Web site or from MacUpdate.com.