SAN FRANCISCO (AP) — Technology companies that led the charge into remote work as the pandemic unfurled are confronting a new challenge: how, when and even whether they should bring long-isolated employees back to offices that have been designed for teamwork.

"I thought this period of remote work would be the most challenging year-and-half of my career, but it's not," said Brent Hyder, the chief people officer for business software maker Salesforce and its roughly 65,000 employees worldwide. "Getting everything started back up the way it needs to be is proving to be even more difficult."

That...