On October 19, 2021, we have enabled single-sign-on for our Plesk Support Center to provide a seamless login/account experience. This implies that you’ll be able to use a single account across any of our web-facing properties.
If you had already registered your account at Plesk 360 (formerly known as My Plesk) please use one for login. Otherwise please re-register it using the same email address as your existing Zendesk login (support account). It’s essential that you use the same email address on our support center to ensure that your tickets stay attached to the same account.

Plesk shows HTTP Error 503. The service is unavailable: The identity of application pool PleskControlPanel is invalid




  • Avatar
    Twan Lommers


    I got this problem now.
    But i am already using it for 3 years in a row without any problems.
    How can this happen? 


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  • Avatar
    Maxim Krasikov

    Hi @Twan Lommers,

    Please contact Plesk support for the assistance: https://support.plesk.com/hc/en-us/requests/new 

    Probably, some clues about the reported behavior can still be available on the server.

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