No. If you are a nonresident whose primary office is in New York State, your days telecommuting during the pandemic are considered days worked in the state unless your employer has established a bona fide employer office at your telecommuting location.
Since your husband's employer had an office in Connecticut and was transferred to work out of that office, then the majority of his income for the tax year would not be taxable in NYS. The only income taxable to New York would be for the time before he was transferred to the Connecticut office.
NYS Nonresident FAQs
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