Employee Offboarding and IT Security: A Checklist for Protecting Your Business When Someone Leaves

When an employee leaves a company, there are plenty of administrative tasks to handle. Payroll needs to be updated, company property may need to be returned, responsibilities have to be reassigned, and coworkers and clients may need to be notified.

One area that should never get lost in the process is IT.

Employees can accumulate access to dozens of systems during their time with an organization, including email, Microsoft 365, cloud applications, shared folders, business software, remote access tools, and company devices. If that access is not properly removed when someone leaves, the organization can be left with unnecessary security and compliance risks.

A standardized IT offboarding process helps businesses close those gaps while protecting company data and maintaining control over their technology.

Why Employee Offboarding Is an IT Security Issue

Most businesses carefully control the technology access given to new employees.

Accounts are created, permissions are assigned, devices are configured, and applications are installed according to what the employee needs.

That same attention needs to be given when the employee leaves.

An active account belonging to a former employee can become an unnecessary point of exposure. Even when there is no concern about the departing employee, unused accounts and credentials may eventually be compromised by an outside attacker.

This is why access management should be an important component of a broader cybersecurity strategy.

Businesses need a repeatable process that identifies every system an employee could access and ensures that access is properly addressed during offboarding.

1. Disable the Employee's Microsoft 365 Access

For many businesses, Microsoft 365 is one of the first places IT should address during offboarding.

An employee's Microsoft account may provide access to Outlook, Teams, OneDrive, SharePoint, shared resources, and other company information. Simply removing the employee from the company directory may not be enough to properly secure all of these resources.

Depending on the organization and the employee's role, the offboarding process may involve:

• Blocking account access

• Revoking active sessions

• Reviewing multi-factor authentication methods

• Removing access to Teams and SharePoint resources

• Transferring important OneDrive files

• Managing email forwarding or mailbox access

• Reviewing group memberships

• Reassigning or removing Microsoft 365 licenses

Organizations should also determine what company information needs to be retained before accounts or licenses are removed.

Proper Microsoft 365 management can help businesses maintain better control over users, permissions, security settings, licensing, and company data throughout the employee lifecycle.

2. Remove Access to Business Applications

Microsoft 365 may only be one part of an employee's technology footprint.

Think about how many applications the average employee uses during a normal week. Depending on their position, that could include accounting software, CRM platforms, project management applications, HR systems, cloud storage, industry-specific applications, vendor portals, communication platforms, and other SaaS tools.

IT should maintain an inventory of approved business applications and understand which employees have access to them.

When an employee leaves, those accounts should be disabled or transferred as appropriate.

This also highlights the importance of controlling shadow IT. If employees are signing up for applications without IT's knowledge, the organization may not know those accounts exist when it is time to remove access.

3. Recover and Secure Company Devices

Laptops, desktops, smartphones, tablets, security keys, and other company-owned technology should be accounted for during offboarding.

Recovering a laptop is only part of the process.

IT should determine whether the device contains company data, verify that necessary information has been preserved, and prepare the device before it is assigned to another employee.

Organizations with remote or hybrid employees should have procedures for returning equipment from outside the office as well.

Device management is also an area where a reliable IT help desk can help. CBM IT's help desk services include endpoint configuration and support, Microsoft 365 administration, application support, and other day-to-day IT needs.

4. Revoke Remote Access

Remote and hybrid work have made access management more complicated.

Employees may be able to connect to company systems from their homes, while traveling, or through multiple devices. Depending on the organization's infrastructure, this may involve VPN credentials, remote desktop access, cloud applications, remote monitoring tools, or other systems.

An employee's remote access should be reviewed and revoked as part of the offboarding process.

IT should also consider whether the employee had access through personal devices and determine whether additional steps are necessary to protect company information.

5. Review Shared Accounts and Credentials

Ideally, employees should have individual accounts whenever possible. Individual identities make it easier to control permissions and understand who has accessed a particular system.

However, many organizations still have shared credentials for certain services.

If a departing employee knows passwords for shared accounts, those credentials may need to be changed. IT should also review API keys, administrative credentials, service accounts, or other sensitive access the employee may have used.

This is particularly important when offboarding employees with elevated IT or administrative privileges.

6. Transfer Important Files and Responsibilities

Disabling accounts too quickly without considering data ownership can create a different problem: employees may suddenly lose access to information the business still needs.

Before removing an account, determine whether important files, emails, calendars, application data, or other resources need to be transferred.

For example, an employee may own files in OneDrive that several coworkers rely on. A manager may need continued access to a departing employee's business communications. An application account may also need to be transferred to another employee rather than simply deleted.

Having a documented process helps prevent valuable business information from disappearing during a transition.

7. Review Permissions When Employees Change Roles

Offboarding should not be limited to people leaving the company.

Access should also be reviewed when an employee moves to a different position.

Someone who moves from one department to another may retain permissions from their previous role while receiving additional access for the new one. Over several years, these permissions can accumulate.

Businesses should periodically review access and follow the principle of least privilege, meaning employees receive the access necessary to perform their jobs without maintaining unnecessary permissions.

Regular reviews can be incorporated into a broader IT compliance strategy. CBM IT's Technology Compliance services include ongoing reviews designed to align IT systems with established best practices and reduce technology risk over time.

8. Coordinate IT and HR

Effective employee offboarding requires communication between departments.

HR often knows first when someone is leaving. IT knows which technology systems need to be secured.

The two need a defined process for sharing that information.

Ideally, an offboarding request should tell IT the employee's final date, when access should be removed, what equipment needs to be collected, who should receive company data, and whether any special access considerations exist.

For certain departures, access may need to be removed immediately. For others, IT may need to coordinate the transition over several days.

A documented workflow reduces confusion and makes the process easier to repeat consistently.

Make IT Offboarding Part of Your Security Strategy

Employee departures are a normal part of running a business. They should not create unnecessary technology risk.

A strong IT offboarding process gives your organization a consistent way to disable accounts, recover devices, preserve company information, revoke permissions, manage Microsoft 365, and document changes.

The key is making the process repeatable.

Rather than relying on someone to remember every account or application an employee might have used, businesses can create standardized procedures that connect HR, management, and IT.

CBM IT helps businesses maintain secure and well-managed technology environments through Microsoft 365 services, cybersecurity solutions, help desk support, and technology compliance.

If your organization needs a more consistent approach to managing employee access and protecting company technology, contact CBM IT to discuss how a proactive IT strategy can help.