web
You’re offline. This is a read only version of the page.
close
Skip to main content

Announcements

No record found.

News and Announcements icon
Community site session details

Community site session details

Session Id :
Finance | Project Operations, Human Resources, ...
Answered

The server took too long to respond in D365FO

(0) ShareShare
ReportReport
Posted on by 336

Hello Dynamics community 

A quick question again, i receieve the following error message when i start the application, and i don't know it's related to what exactly.

Any ideas, configurations i have to check ? 

Thank you

Server took too long time to respond

I have the same question (0)
  • Suggested answer
    nmaenpaa Profile Picture
    101,172 Moderator on at

    The first thing that I would check is the URL that you are using to open the application. Do you have anything extra there after the dynamics.com/ ? If yes, try to remove that and see if it helps.

    Is this a dev box? Test system? Prod? Is it working for others or not working for anyone? What changes were made in the system before it stopped working?

  • Rahul Mohta Profile Picture
    21,046 on at

    what activity were you doing?

    if it could be done in batch?

  • André Arnaud de Calavon Profile Picture
    304,837 Super User 2026 Season 1 on at

    Hi Adax,

    Please answer the questions from Nikolaos. If it is a VM which just got started with a minimum of hardware sizing, then indeed this error can occur as it needs caching. Consider monitoring the hardware resources and see if you need to add CPU or memory. Also make sure the VM is running on a fast disk as there is a lot of I/O.

  • AdnDalhi Profile Picture
    336 on at

    Hi Nikolaos,

    This is dev environment,

    I've tried the standard URL, when i click on one of modules, i cant access to any module, IIS 503 error appears

    pastedimage1585649013298v1.png

    pastedimage1585649815793v2.png

  • Verified answer
    nmaenpaa Profile Picture
    101,172 Moderator on at

    503 unavailable means that AOS is not running.

    First of all, make sure that you can build your code (all your custom models) succesfully. Once you get a succesful build, do a db sync. After succesful db sync, try to open D365 again. Does it work now?

    Also, you did not yet answer to question "What changes were made in the system before it stopped working?" But whatever the answer is, please undo those changes, do a build, db sync and try again.

    Eventually, if it feels that fixing it would take more than a couple of hours, I always recommend to deploy a new dev system since it's quicker and therefore cheaper for your company.

  • AdnDalhi Profile Picture
    336 on at

    Full build + Full DB Sychro done, apparently no errors,

    But the problem still persist

  • Suggested answer
    André Arnaud de Calavon Profile Picture
    304,837 Super User 2026 Season 1 on at

    Can you check if in Internet Information Services (IIS) the site AOSService is running correctly?

    Possibly, you can also search in Windows events for possible more detailed error messages.

  • AdnDalhi Profile Picture
    336 on at

    Thanks to all of you, a new VM has been created, it's work fine now.

    Issue resolved

Under review

Thank you for your reply! To ensure a great experience for everyone, your content is awaiting approval by our Community Managers. Please check back later.

Helpful resources

Quick Links

Introducing the 2026 Season 1 community Super Users

Congratulations to our 2026 Super Stars!

Meet the Microsoft Dynamics 365 Contact Center Champions

We are thrilled to have these Champions in our Community!

Congratulations to the April Top 10 Community Leaders

These are the community rock stars!

Leaderboard > Finance | Project Operations, Human Resources, AX, GP, SL

#1
Giorgio Bonacorsi Profile Picture

Giorgio Bonacorsi 664

#2
André Arnaud de Calavon Profile Picture

André Arnaud de Cal... 615 Super User 2026 Season 1

#3
CP04-islander Profile Picture

CP04-islander 550

Last 30 days Overall leaderboard

Product updates

Dynamics 365 release plans