When Twitter reopens the majority of its 35 offices in September, only a fraction of the company’s employees will physically report for duty.

On Tuesday, Twitter CEO  Jack Dorsey sent an email to employees, informing them of the decision.

Like many other companies, the pandemic forced the social media business to speed up the enforcement of its work from home policy and once the lockdown ends that option will be available to most employees with the exception of groups such as maintenance staff.

“If our employees are in a role and situation that enables them to work from home and they want to continue to do so forever, we will make that happen,” a Twitter spokesperson said in a statement to The Verge. “If not, our offices will be their warm and welcoming selves, with some additional precautions, when we feel it’s safe to return.”

Twitter’s employees have already been working from home since March 12th when the company ordered all employees to work out of their homes due to the COVID-19 pandemic.