Crossware Mail Signature for Office 365

The Secure and Reliable Signature Solution

Email Security

We don’t store or copy your emails within our service, and your emails are secured.

Closed Loop Service

Emails are processed by our service securely within Microsoft Azure Datacenters. No Relay or external services are used.

Not Stored

Emails are not stored, they are returned back to your Office 365 tenant once the signature is applied.

Secured with Transport Layer Security

All communication between your Office 365 email service and the Crossware Mail Signature service, in Microsoft Azure, uses industry-standard Transport Layer Security (TLS) to secure the connection.


Complete Privacy

Crossware does not log any email content or properties other than Message-IDs and time stamps, which we use only to monitor the service.

Read Only Access to your Active Directory

Our access to your Active Directory (WAAD) is strictly read only, and data is only held in memory.

No Tampering with Encrypted Emails

We do not insert signatures on Encrypted emails, because to do so would break the security of that encryption.

Your Information is Yours

Every organisation that uses our service has their own unique database for managing and creating signatures – your information is not available to anyone else.

Full Control of Signature Editors

Access to the Signature Designer is restricted using your Office 365 credentials – allowing you to grant other people access to the designer as required.

Always Available

Since the launch of the Crossware Mail Signature Service, we have maintained an Uptime of 100% (last reviewed Q3 2018). Each region had an individual up time of 99.8%, but due to the redundancy (via our multi regional service: US, EU and AP) the service was available 100% of the time.

Built-in Redundancy

If there is a failure in the Microsoft Datacenter in your region, processing will be automatically moved to another region and signatures will continue to be applied (this capability can be disabled if desired).

Scaling with Azure

We take advantage of the Azure environment, allowing us to scale the service as demand changes over the day, and across different timezones.

Highly Responsive


No Delays

There is no significant delay introduced by the Crossware Mail Signature Service – the average processing time was less than 3 seconds across all regions.

Simple Setup

There is no additional software to install, or new passwords to remember!

Login with your Office 365 Credentials

No new usernames and passwords – simply log in with your Office 365 credentials (anyone who has been granted access in your organisation can create and edit signatures, not just Global Administrators).

Ready-to-Use Templates

Quickly create signatures with our collection of full-editable, professional templates.

Visual or HTML Editor

Swap between the visual and HTML editor to create the perfect signature, no matter your level of design expertise.


Looking for our policy on Data Security and GDPR? Check it out here.

Try Crossware Mail Signature for 30 days, for free!