Process MSEXCHANGE AD TOPOLOGY SERVICE.EXE (PID=1756). Topology discovery failed, error 0x8007077f

IT Problem

You are experiencing your exchange server sitting at starting services. When you check the services console you will find that the information store is in a stopped or in a hung starting state, additionally a number of other services are stuck in a starting state including the Microsoft exchange transport serviceThe Microsoft Exchange Transport service is an SMTPSMTP or Simple Mail Transfer ProtocolSMTP or Simple Mail Transfer Protocol is a protocol used to send Email over the internet.SMTP runs on port 25 and it its most basic form uses three command/reply sequences.MAIL, RCPT and Data.So an email client sends an email to another client by connecting to the SMTP server of a company which then sends the email to another companies SMTP server which inturn sends the email to the local client. is a protocol used to send Email over the internet.SMTP runs on port 25 and it its most basic form uses three command/reply sequences.MAIL, RCPT and Data.So an email client sends an email to another client by connecting to the SMTP server of a company which then sends the email to another companies SMTP server which inturn sends the email to the local client. service in Exchange Server 2007 and Exchange 2010 onwards which controls mailflow in and out of your exchange system. This service will only run in the Exchange Active Directory Topology Service is running. and the Microsoft exchange topology service.

In Event viewer you see the following error.

Log Name:      Application
Source:        MSExchange ADAccess
Date:
Event ID:      2142
Task Category: Topology
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      allenserver.allendomain.com
Description:
Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=1756). Topology discovery failed, error 0x8007077f.

The main clue here is the Event ID 2142 and Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=1756). Topology discovery failed, error 0x8007077f.

IT Solution

The issue you are seeing here is that your server cannot see active directory, if you have multiple sites you need to make sure that both sites have a sub net assigned to them.

Under sub net right click and select  new sub net

Once in there enter your sub net, you will then need to assign it to the relevant site. Once done, go to the services console and start the exchange services or you can rebootReboot is a term used to describe when you restart a PC / Server that is already running. If you install software to your pc, the softwre may require a reboot to complete its installation. the server. You will find the exchange will now start fine

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