A statement on the Government's Covid-19 Facebook page said the name was being switched back until the international threat of Covid-19 was eliminated.
"This does not mean we are moving alert levels but it does mean we still have work to do in our fight against Covid-19.
"We have Covid-19 under control in New Zealand – thanks to all your efforts and those of our frontline health workers and essential workers across the country.
"However, globally the virus remains a major threat. So we will remain 'Unite against Covid-19' until the risk to New Zealand is reduced."
A spokesperson for the All-of-Government COVID-19 response said the name change was partly designed to prevent complacency.
"A global pandemic is raging outside New Zealand and it is important that New Zealanders do not become complacent about their role in continuing to keep New Zealand safe in the months to come."
The renaming of the campaign to "Unite for Recovery" sparked protest from the Act Party, which said it was repurposing the pandemic response as political propaganda.
Act Party leader David Seymour said the advertising campaign was promoting the Labour-led Government's strategy and programmes, and called for it to be dropped when the pre-election period began.
"With an election on the horizon, Labour will keep the country on a war footing and continue its daily political broadcasts," he said.
While it is not explicitly banned, the Cabinet Manual notes governments have previously chosen to avoid advertising campaigns in the three months before an election to avoid the impression public funds are being used for party political purposes.
In response to Act's protests, Prime Minister Jacinda Ardern said the official campaign would continue during the pre-election period.
The Government had a duty to inform businesses and New Zealanders what support was available, she said at the time.
"We have to continue to make sure that even if there's an election on, people know about the support available here and now. It's our job to make sure people know about that."