# Upgrading Avaya one-X Agent to Release 2.5

Important

Avaya recommends that you upgrade the Central Management 2.5 server before upgrading the Avaya one-X Agent 2.5 client if you are deploying the Avaya one-X Agent system with Central Management.

The Avaya one-X Agent installer automatically upgrades any of the following versions already installed on your system to Release 2.5:

- Avaya one-X Agent Release 1.0

- Avaya one-X Agent Release 1.0, SP1

- Avaya one-X Agent Release 2.0

- Avaya one-X Agent Release 2.0, SP1

- Avaya one-X Agent Release 2.0, SP2

- Avaya one-X Agent Release 2.0, SP3

Important

Do not try to upgrade between interim build versions of the Avaya one-X Agent Release 2.5, as the Avaya one-X Agent installer does not support. If you attempt to update the application between the build versions, the system displays errors while logging in.

Use the following steps to upgrade Avaya one-X Agent to Release 2.5.

1. Using a Windows Explorer, navigate to the directory containing the Avaya one-X Agent software using Windows Explorer and double-click the OneXAgentSetup.exe file.

   The system detects the earlier installation and proceeds to remove the installed version of Avaya one-X Agent. After successful removal of previous version, the system starts the installation wizard and displays the welcome screen.

2. To enable or disable any feature before upgrading to Avaya one-X Agent 2.5, open the install.properties file and modify the feature options.

   The install.properties file is present in the same folder as OneXAgentSetup.exe.

3. Follow steps 3 through 16 in Installing Avaya one-X Agent manually.

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