Centralized Signature

One signature.Every device.Centrally managed.

Conbool Disclaimer applies email signatures server-side, regardless of device, mail client or operating system. Consistent, centrally maintained and without user intervention.

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Centralized Email Signature: Server-Side on Every Device

When employees manage their own email signatures, the result is inconsistencies, missing legal disclaimers, and brand violations. Centralized, server-side email signatures solve this problem fundamentally: the signature is added on the server at send time – regardless of whether the email is sent from Outlook, a smartphone, or a web interface.

Why decentralized signatures fail

Decentralized Signature Management

When every employee sets up their own signature, dozens of variations emerge. Outdated phone numbers, wrong logos, and missing disclaimers are the norm, not the exception.

Missing Legal Requirements

Business emails require certain details under German commercial and company law and other rules. If they are missing, warning letters and coercive fines may follow, especially when not every mail client is set up correctly.

Employees Forget or Modify

New employees set up signatures incorrectly, existing ones change them at will. On mobile devices, the signature is often missing entirely. IT has no control over the outcome.

How centralized signatures work technically

Conbool Disclaimer applies signatures server-side – after the user sends the email, but before delivery to the recipient.

Server-Side Application

The signature is applied in the mail flow, not in the client. This route needs no Outlook add-in, no GPO distribution and no local settings. If desired, it also appears in your own copy in Sent Items.

Device-Independent

Whether Outlook Desktop, Apple Mail, webmail, or smartphone – the signature is always applied identically because it is added on the server.

Not editable on the device

Employees cannot change or delete the server-side signature on their device. Exceptions are set by administrators through rules.

Directory sync

Name, department, phone number and job title come automatically from Entra ID, on-premises Active Directory or LDAP. No manual updates needed.

Mobile Compatible

Emails sent from smartphones often lack signatures. With server-side application, mobile emails also receive the complete, correct signature automatically.

Instant Rollout

New signatures or changes apply to all employees, without client updates, without restarting Outlook and without training.

Why server-side beats Outlook templates

Signatures maintained in the mail client have weaknesses that the server-side route avoids.

No installation on the device

The server-side route requires nothing to be installed or maintained on any device. An Outlook add-in is available in addition if the signature should be visible while typing.

Works on Every Device

A signature stored in Outlook only applies in that program on that device. Webmail, phones and other apps go without. Server-side, every outbound message through the mail flow is covered.

No changes on the device

With signatures in the mail client, employees can delete, change or replace them. The server-side signature is only added after sending.

Mail flow instead of group policies

Outbound messages pass through a connector to Conbool and receive the signature there. This needs no group policies and works in cloud and hybrid environments.

Anatomy of a message

Four building blocks, maintained separately.

Marketing maintains the campaign, legal the notice, IT the rules. Nobody touches anyone else's template, and a trade fair banner expires on its end date by itself.

To
Subject
1Banner

Message body

2Signature
3Campaign
Time window per block
4Legal notice

Quoted thread

  1. 1

    Banner

    Always at the top. Room for an event or a notice about external senders.

  2. 2

    Signature

    Name, title, direct line and photo from the directory. Empty fields hide their line.

  3. 3

    Campaign

    Its own block with its own time window. It follows the block before it, at the top below the banner or at the bottom below the signature.

  4. 4

    Legal notice

    Legal details from the central company data, either right after the signature or after the whole thread.

Time window per blockPosition per blockShort version for repliesTemplate per language

Sent Items

Your own copy looks like the recipient's.

Exchange stores the copy when you hit send, before any server-side signature can be added. That affects every server-side signature, whichever the vendor. Conbool therefore adds the signature in the mailbox after delivery.

  1. 1

    Send in Outlook

  2. 2

    Exchange stores the copy in Sent Items, still without signature

  3. 3

    Conbool adds the building blocks and delivers

  4. 4

    The copy receives the same signature

The original is never deleted
Separate consent, apart from the connection
Only delivered messages are updated

Requires Microsoft 365 with a connected organisation and a separately granted consent. If the signature is inserted by the Outlook add-in, it is already in the copy while composing.

FAQ

What does 'centralized email signature' mean?
A centralized email signature is not configured by the employee on their device. Instead, it is applied server-side to all outgoing emails. The signature is added on the mail server at send time – regardless of the client or device used.
Does the centralized signature work on smartphones?
Yes. Since the signature is applied server-side, it doesn't matter whether the email is sent from Outlook, Apple Mail, the Gmail app, or any other client. Every outgoing email automatically receives the correct signature.
Can employees bypass the centralized signature?
Not on the device. The signature is applied after the message has been sent, so the user has no influence on it. Exceptions, for example for automated invoice sending, are set by administrators through rules.
How is employee data inserted into the signature?
Conbool Disclaimer syncs user data automatically with Entra ID, on-premises Active Directory or LDAP. Name, job title, phone number, department and other fields are used as placeholders in the signature template and filled on every send.
What is the difference from email signature management software?
Email signature management describes the overall concept: creating templates, defining rules, integrating campaigns. Centralized email signature describes the technical approach of server-side application. Conbool Disclaimer combines both in one solution.
Does the centralized signature work with Microsoft 365?
Yes. Outbound messages from Microsoft 365 and Exchange Online pass through a connector to Conbool and receive the signature there, regardless of the mail client.
Does central signature management work without an MX change?
Yes. If you would rather not route your mail through another provider, central management can run through the Outlook add-in alone. Templates, placeholders from the directory and the per-group assignment stay central; the add-in sets the signature in the mailbox while the message is written. What you need is a connected Entra ID and central deployment of the add-in through the Microsoft 365 admin centre. What you do not need is an MX change, an SPF record, a DKIM key or anything installed on your own premises. The limits of this mode: Outlook only, Exchange Online mailboxes only, no rules with banners and campaigns, and the signature can be edited in the mailbox.

Manage signatures centrally – on every device.

Try Conbool Disclaimer free for 30 days and experience how simple centralized email signatures can be.

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