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ExSign

System Requirements

Before You Install

Use this page to check whether your environment is ready for ExSign for Exchange, and to decide how many servers you'll need. Confirm each step below before you start the installation.

Supported Exchange Servers 

ExSign only works with these Exchange Server versions: 

  • Exchange Server Subscription Edition (SE) 
  • Exchange Server 2019 
  • Exchange Server 2016 

Decide Your Environment 

ExSign for Exchange consists of three components: the ExSign Web Portal, the ExSign Transport Agent, and (optionally) the Sent Items Update Agent. How you spread these across servers depends on your environment: 

Your Situation

What You Need 

Single server / small environment 

You can install the Web Portal and Transport Agent on the same machine. 

Standard environment 

Install the Web Portal on its own server, separate from your Exchange Mailbox servers. 

High availability (HA) 

Install two (or more) Web Portal servers so the portal stays available if one goes down. 

Whichever path you choose, the Transport Agent still needs to be installed on every Exchange Mailbox server in the entity. 

Keep your choice in mind as you check the requirements below. It determines how many of the "Web Portal" specs you need to provision. 

Software and Hardware Requirements 

ExSign Web Portal 

ExSign Web Portal is a web-based utility accessible on the Internet. It’s recommended that the ExSign Web Portal be installed on a separate Windows Server. The Windows Server can be part of a domain or a standalone server. However, if you only have a single machine, you can have both the web portal and the agent on the same machine. There can also be multiple portal servers for high availability. These portal servers will be public facing. 

The portal server should have: 

Software Requirements
Hardware Requirements
System Name CPU Cores RAM HDD Role Installation and Type
Portal 1 2 8 GB 200 GB SSD Web Portal Servers ExSign Portal (Physical or Virtual Machine)
Portal 2 (HA Mode) 2 8 GB 200 GB SSD ExSign Portal (Physical or Virtual Machine)

ExSign Transport Agent 

ExSign Agent is developed to work as a desktop utility and should be installed on all Exchange Mailbox servers in the Entity. 

The Mailbox server should have: Software needed: 

  • .NET 4.8 Framework 
  • .NET Desktop Runtime 8 
  • .NET Runtime 8 

Sent Items Update Agent (Optional) 

Sent Items Update Agent is developed to work as a desktop utility and should be deployed either on the portal server or a standalone server. The server should have.

Software Requirements
Hardware Requirements

 
System Name CPU Cores RAM HDD Role Installation and Type
Sent Item Update (Entity Side Instance) 2 6 GB 200 GB SSD Sent Items Update Servers Sent Items Update Agent Service (Physical or Virtual Machine)

ExSign Database 

ExSign stores its database in Microsoft SQL Server. It is possible to connect to a remote MSSQL database instance regardless of its location. 

However, to set up a separate MSSQL Server instance, here are the recommendations for a typical production workload. 

Software Requirements
Hardware Requirements

 
System Name CPU Cores RAM HDD Role Installation and Type
MSSQL (Dedicated SQL Server) 2 8 GB HDD 300 GB SSD SQL Instance for HUB Control Server Remote Connection (MSSQL HA Mode)

Quick Checklist Before You Move On 

  • Exchange version confirmed supported 
  • Decided single-server vs. separate-server vs. HA setup 
  • Web Portal server(s) provided with required software
  • Transport Agent prerequisites confirmed on every Mailbox server 
  • Sent Items Update Agent server decided (if you want this feature)
  • SQL Server database ready (dedicated or existing remote instance)