> ## Documentation Index
> Fetch the complete documentation index at: https://syteca.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Update the Application Server

> Upgrade the Syteca Application Server to a newer version — Setup wizard's Update path, database update vs reinstall, .NET 8.0 prereqs, and SMBv2 update warning.

This is the Application Server-specific portion of a Syteca upgrade — running `Syteca_Server.exe` with the **Update/Add/Remove components** path. For the **full system upgrade procedure** including pre-update database backup, Isolation Mode, post-update data migration, and Client updates, see [Update Syteca](/docs/administration/deployment/update-syteca).

<Warning>
  **NOT AVAILABLE IN SAAS.** SaaS deployments are updated by your vendor. This procedure applies to **on-premises** deployments only.
</Warning>

<Note>
  Before running this procedure, follow the **Phase 1** preparation steps in [Update Syteca](/docs/administration/deployment/update-syteca#1-before-updating-the-system) — disable auto-update on Clients, enable Isolation Mode, back up the database, snapshot the Application Server host. Skipping those steps leaves the deployment without a recovery path if anything goes wrong.
</Note>

## Run the Setup wizard's Update path

<Frame caption="The Setup wizard's Already Installed page when running Syteca_Server.exe on a host with an existing installation — pick Update/Add/Remove components to upgrade in place.">
  <img src="https://mintcdn.com/syteca/0FlD-vkHsBA1azVX/images/administration/deployment/setup-wizard-already-installed.png?fit=max&auto=format&n=0FlD-vkHsBA1azVX&q=85&s=5634146710b5344366c16896fc4e047f" alt="Syteca Setup wizard Already Installed page showing Update/Add/Remove components and Uninstall radio options" width="497" height="386" data-path="images/administration/deployment/setup-wizard-already-installed.png" />
</Frame>

<Steps>
  <Step title="Run the new installer">
    Run **`Syteca_Server.exe`** for the **new** Syteca version on the Application Server host. The same installer binary handles install, update, and uninstall.
  </Step>

  <Step title="Step through the wizard">
    Click **Next** on the **Welcome** page. On the **License Agreement** page, accept the EULA.
  </Step>

  <Step title="Verify prerequisites">
    On the **Requirements** page, the wizard checks for **.NET Runtime 8.0** and **ASP.NET Core 8.0 Runtime** (required for Syteca v.7.23 and higher).

    * **Yellow triangles** indicate missing components — click the links to install each, then click **Refresh**.
    * **Green checkmarks** indicate satisfied prerequisites.

    Click **Next** when all icons are green.

    <Warning>
      For pre-v.7.23 installations being upgraded **to** v.7.23 or higher, the .NET requirement changes from **.NET Framework 4.8** to **.NET 8.0**. Install the .NET 8.0 runtimes on the Application Server host **before** running the update.
    </Warning>
  </Step>

  <Step title="Pick the Update path">
    On the **Already Installed** page, select **Update/Add/Remove components**, then click **Next**.

    <Note>
      If you see an **SMBv2 update warning** pop-up when updating to v.7.23 or higher with a shared folder for binary data storage, see [Application Server issues and error messages](/docs/resources/troubleshooting/application-server-troubleshooting) for the resolution.
    </Note>
  </Step>

  <Step title="Choose database handling">
    On the **Database Update** page, pick one:

    | Option                               | What it does                                                                                                                  |
    | ------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------- |
    | **Update database to a new version** | Keeps existing data; applies the schema migrations needed for the new Syteca version. *(Most common — preserves history.)*    |
    | **Reinstall the database**           | Drops the existing database and creates a fresh one. **All historical data is lost.** Use only when you intend to start over. |

    <Warning>
      **Changing the database type** (e.g. PostgreSQL ↔ MS SQL Server) requires reinstalling the entire system, not just the database. The **Reinstall the database** option only handles re-creating within the same database type.
    </Warning>

    Click **Next** to start the update.
  </Step>

  <Step title="Finish and verify">
    When the update completes, click **Finish** to exit the wizard.

    The Application Server starts automatically. The **orange Data Migration Progress Bar** appears at the top of all Management Tool pages while post-update data migration runs in the background — see [After updating the system](/docs/administration/deployment/update-syteca#3-after-updating-the-system) in the system-wide upgrade procedure for the post-migration steps (update Clients, disable Isolation Mode, verify operation).
  </Step>
</Steps>

## Related

<CardGroup cols={2}>
  <Card title="Update Syteca (full upgrade procedure)" icon="arrow-up" href="/docs/administration/deployment/update-syteca">
    The system-wide upgrade workflow — backup, Isolation Mode, data migration, Client updates.
  </Card>

  <Card title="Install Application Server" icon="server" href="/docs/administration/deployment/install-application-server">
    Fresh Application Server installation (for new deployments).
  </Card>

  <Card title="Master Certificate management" icon="key" href="/docs/administration/security/master-certificate">
    Back up the Master Certificate before updating — required for recovery if the update fails.
  </Card>

  <Card title="Release notes" icon="scroll" href="/docs/release-notes/overview">
    Review changes between your current version and the target — including data migrations.
  </Card>
</CardGroup>