Exchange 2016 – ECP ERROR 500 – OWA Working Fine!

As an IT professional for over 20 years I have run into a lot of strange errors in my time. I also have an extensive home “production” lab so I can stay up to date on changes in tech and its fun! Recently I installed Exchange 2016 in a Hyper-V virtual machine. It was a simple migration from 2013. I was in the process of decommissioning an older Hyper-V host. Some of my guest vm’s were migrated while others were built from scratch.

I had  completed my migration and Exchange, OWA, & ECP were working just fine. About a month later I tried to access the ECP and was greeted with a 500 Error!

Tracking Down The Error

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Exchange 2016 – EVENT ID 15021- Blank ECP / OWA & Error connecting to Outlook

If you have been following my blog, I recently migrated my Exchange 2010 server to a new 2016 server. There have been a few hiccups along the way however for the most part  the experience has been good and user disruption minimal, until I encountered Event ID 15021.

ExchangeLast night during a maintenance window I applied my Microsoft updates and rebooted the server. Shortly after reboot I attempted to open Outlook and it failed with a server unavailable error. OWA and ECP both showed BLANK white screens. I began to panic a little because this is probably the IT guys worst nightmare! Working in the industry for over 20 years I put my panic aside and began my standard troubleshooting procedure.

STEP 1 – Event logs are your friend

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My Experience Migrating to Exchange 2016

If you have ever taken the time to read my blog you would probably know by now that I am the IT director for a mid sized accounting firm in NJ. One project on my docket this year is to migrate from Exchange 2010 to Exchange 2016. This post is just going to be a basic log of what I encountered during my install. If you take the time to read this maybe you can find a useful tip to aid in your migration woes.

Having a small shop and wearing a lot of hats here in the office tends to create a slew of challenges. Most of the time I have a ton of projects brewing so focusing on one can be difficult at times. My migration to a new Exchange 2016 server will be gradual taking about 2 to 3 weeks to complete. During the initial setup I like to let certain steps “stew” overnight to make sure there are no disruptions. I also like to be sure I have a contingency plan to undo any unforeseen issues.

Is your directory active enough?

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