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Jeff Guillet
Works at ExtraTeam
Attended Savanna High School
Lives in Pacifica, CA
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Jeff Guillet

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Fix for Exchange ActiveSync Failures After Migration to Exchange 2013
There’s a bug in Exchange 2013 that causes Exchange
ActiveSync to fail for newly migrated users from Exchange 2010. It only affects migrated users who
already have a mobile device configured, not new users (i.e., test mailboxes). This issue was discussed in...
There’s a bug in Exchange 2013 that causes Exchange ActiveSync to fail for newly migrated users from Exchange 2010. It only affects migrated users who already have a mobile device configured, not new users (i.e., test mailbox...
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Notes on the Windows 8.1 Update for Windows Server 2012 R2
Microsoft has released the Windows 8.1 Update to MSDN subscribers and is due to be released today to the general public. This update also applies to Windows Server 2012 R2 servers and includes some important updates, including one that will be required so t...
Microsoft has released the Windows 8.1 Update to MSDN subscribers and is due to be released today to the general public. This update also applies to Windows Server 2012 R2 servers and includes some important updates, includin...
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Jeff Guillet

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Announcing the 7th Annual UC Roundtable at TechEd 2014, Houston!
I'm pleased to announce the  7th Annual UC Roundtable  at  Microsoft TechEd North America 2014  in Houston, TX! The purpose of the UC Roundtable is to gather Exchange and Lync admins, MCMs, MVPs, Exchange product group members, architects, and experts for a...
I'm pleased to announce the 7th Annual UC Roundtable at Microsoft TechEd North America 2014 in Houston, TX! The purpose of the UC Roundtable is to gather Exchange and Lync admins, MCMs, MVPs, Exchange product group members...
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Jeff Guillet

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Troubleshooting TLS SMTP Connections to Exchange Online Protection
By default Office 365 uses Transport Layer Security (TLS) to send encrypted SMTP emails between Exchange Online and Exchange on-prem. This provides end-to-end encryption of emails between your on-prem Exchange Hybrid Server and Exchange Online Protection (E...
By default Office 365 uses Transport Layer Security (TLS) to send encrypted SMTP emails between Exchange Online and Exchange on-prem. This provides end-to-end encryption of emails between your on-prem Exchange Hybrid Server a...
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Jeff Guillet

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Exchange 2013 Client Access Coexistence with Exchange 2010
The following guide explains how Exchange 2013 Client Access coexists with Exchange 2010 during a long-term migration. Note: If you are migrating from Exchange 2007 please see my companion article . Greg Taylor had a fabulous session on  Microsoft Exchange ...
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The 'Heartbleed' Security Flaw - Are You Affected?
(CNN) -- A major online security vulnerability dubbed "Heartbleed" could put your personal information at risk, including passwords, credit card information and e-mails. Heartbleed is a flaw in OpenSSL, an open-source encryption technology that is used by a...
(CNN) -- A major online security vulnerability dubbed "Heartbleed" could put your personal information at risk, including passwords, credit card information and e-mails. Heartbleed is a flaw in OpenSSL, an open-source encrypt...
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Jeff Guillet

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MEC 2014 is Right Around the Corner!
I'm very much looking forward to the Microsoft Exchange Conference March 31-April 2 in Austin, TX. I hope you can join me there! I'll be moderating three MEC Unplugged interactive sessions this year and will be on the experts panel for the Exchange Deployme...
I'm very much looking forward to the Microsoft Exchange Conference March 31-April 2 in Austin, TX. I hope you can join me there! I'll be moderating three MEC Unplugged interactive sessions this year and will be on the experts...
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Pending Messages in Exchange Online Will Not Be Delivered
There’s a pretty big unpublicized bug in Office 365 transport that you need to be aware of. Messages from Exchange Online Protection (EOP) that cannot be delivered to an on-prem Exchange hybrid server due to a transport problem will be marked as Deferred or...
There’s a pretty big unpublicized bug in Office 365 transport that you need to be aware of. Messages from Exchange Online Protection (EOP) that cannot be delivered to an on-prem Exchange hybrid server due to a transport pr...
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Jeff Guillet

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Chrome or Firefox will not accept credentials when logging into ADFS server
You may find that Google Chrome or FireFox 3.5+ keeps prompting for authentication when you are redirected to your ADFS 2.0 server.  This is also known to affect Fiddler.  See " AD FS 2.0: Continuously Prompted for Credentials While Using Fiddler Web Debugg...
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Jeff Guillet

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Exchange 2013 Client Access Coexistence with Exchange 2007
I do a lot of coexistence migrations for customers. The following guide explains how Exchange 2013 Client Access coexists with Exchange 2007 during a long-term migration. Greg Taylor had a fabulous session on Microsoft Exchange Server 2013 Client Access Ser...
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People
Have him in circles
151 people
Geni H's profile photo
Work
Occupation
Principal Systems Architect
Skills
Exchange Server, Windows Server, Active Directory, Lync Server, Office 365
Employment
  • ExtraTeam
    Principal Systems Architect, 10 - present
  • Convergent Computing
    Sr. Consultant, 11 - 10
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Pacifica, CA
Links
Other profiles
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Tagline
Exchange MCM & MVP, author, and blogger
Introduction
Microsoft Exchange MCM and MVP, and Principal Systems Architect for ExtraTeam, a Microsoft Gold Partner in Pleasanton, CA. I hold MCITP:Enterprise Administrator and MCITP:Enterprise Messaging Administrator, MCSE:Messaging and CISSP certifications.
 
I'm the co-author of "Windows Server 2008 Hyper-V Unleashed", technical editor of the books "Lync Server 2010 Unleashed" and "Windows Server 2008 Unleashed", and a contributing author of several books including "Exchange Server 2010 Unleashed", "Windows Server 2008 R2 Unleashed" and "Exchange Server 2007 Unleashed", all from Sams Publishing.

I work primarily with Microsoft products (Windows Server, Active Directory, Exchange, Systems Center Operations Manager, ISA, WSUS, etc.). I also work with various other platforms and products, usually in the form of migrations.

Microsoft is not a "religion" for me. They simply provide the best products, in my opinion, and I like to work with the best.
Bragging rights
The only Microsoft Certified Master and MVP for Exchange in North America!
Education
  • Savanna High School
    1989 - 1991
Basic Information
Gender
Male
Jeff Guillet's +1's are the things they like, agree with, or want to recommend.
Talking Exchange Server with Microsoft's Perry Clarke | Tony Redmond's E...
windowsitpro.com

I sat down with Perry Clarke, the Microsoft development supremo for the on-premises and cloud versions of Exchange Server. What Perry had to

End Piracy, Not Liberty – Google
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Millions of Americans oppose SOPA and PIPA because these bills would censor the Internet and slow economic growth in the U.S.. Two bills bef

New Orleans, LA hotels near the Superdome | New Orleans Homewood Suites
www.homewoodsuitesneworleans.com

Welcome to the New Orleans Homewood Suites. We are close to the Superdome, the French Quarter and many other New Orleans attractions.

The EXPTA {blog}: Blistering Fast Windows Server - Parts List and Video!
www.expta.com

My Photo. Jeff: Pacifica, CA, United States: Microsoft Exchange MCM and MVP. I work as a senior consultant for ExtraTeam, a Microsoft Gold P

Entertainment Consumers Association (ECA)
action.theeca.com

Video gamers' Community & Gaming Consumer Advocate: Entertainment Consumers Association (ECA). A grass roots community created to se

The EXPTA {blog}: Issue with IE9 and the Exchange 2010 Management Console
www.expta.com

About Me. My Photo. Jeff: Pacifica, CA, United States; Microsoft MVP and Consultant for ExtraTeam, a Microsoft Gold Partner in Pleasanton, C